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Long life to the moon for a dear noble cratur first investigated the subject as to whether obWhich serves for lamplight all night in the dark, jects become visible by means of something emitted While the sun only shines in the day which by by them, or by means of something issuing from natur

the eye of the spectator.1 Wants no light at all as ye all may remark.

Some of the Greeks conceived vision as due was merely a manufactured story” without

to something (light?) projected from the eye. antecedent, it seems pertinent to remark that They all [some of the Greeks] had a confused this idea of the independence of daylight and notion that as we may feel bodies at a distance by the sun is of great antiquity and somewhat means of a rod, so the eye may perceive them

by the intervention of light. It is very remarkcommon in early civilization.

able that this strange hypothesis held ground for For example, in the Hebrew story of crea- many centuries, and little or no progress was made tion we find:

in the subject till it was established on the au..: God said, Let there be light: and there was

thority of Alhazen in the eleventh century light. And God saw the light, that it was good;

A, D., that the cause of vision proceeds from the

object and not from the eye.2 and God divided the light from the darkness. And God called the light day, and the darkness Aristotle maintained that light was not an he called night. And the evening and the morning emission from any source, but a mere quality were the first day. (Genesis I., 3–5.)

of a medium. This concept appears to be in On the second day God created the land and substantial accord with the first light of the water and on the third day the flora. Not author of Genesis. until the fourth day did God create the sun In spite of the existence of sun worship (Genesis I., 14–18) “ to divide the day from among many savages, it appears that our the night,” “to be for a sign," “ to rule the everyday commonplace concept of the sun as day" and incidentally " to give light upon the the primary source of light is of very recent earth.” Also, God set the “ lesser light (the origin among civilized peoples, and no astonmoon) to rule the night.” It also gave light ishment need be occasioned by finding savages upon the earth. Evidently, the Irishman's who have not grasped it. astronomy” and that of the South American

IRWIN G. PRIEST Indians are in strict and complete accord with WASHINGTON, D, C., the concepts of the author of Genesis. Quite April 20, 1921 clearly, the day was light before the sun was

A SECTION OF THE AMERICAN ASSOCIATION set to rule” it, but the night was dark be

ON THE HISTORY OF SCIENCE fore the moon lighted it. It is not to be

TO THE EDITOR OF SCIENCE: As one of a presumed that we can attribute any Irish wit

group interested in the formation of a section to the author of Genesis, but it may be that

on the history of science, I would venture to the Irishman was a good orthodox churchman

suggest that the inclusive nature of the desigand, in common with many others, accepted nation

History of Science—is well illusthe scripture as his authority in science.

trated by the use of the word “science" by However, the Indians' concept must have been

the parent organization. Surely a section has of independent origin.

the same right to include historical, philoSeriously, does it not appear that the an- logical, and other sciences, which touch the cients, even in a high degree of civilization, history of science under the designationhad only very vague and confused ideas of the History of Science as the parent organizarelation between light and the sun?

tion 'has in its use of the term. The history Simple as it may appear to us to regard a lu

of science touches diverse fields, and as this minous body as the source of some influence, which, 1 Preston, Theory of Light, 3rd Ed., p. 2. acting on the eye, excites the sense of sight, much 2 Preston, p. 5. doubt appears to have existed among those who 3 Preston, p. 4.

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subject becomes more intensely pursued in fight?” It seems likely; and the long line American Universities the contact with philol. from Salamis down, draws to an end. The deogy, anthropology, history, and allied subjects cisive conflicts of the future will be fought by will increase. To group “philological sci- aerial squadrons. ence” with “history of science” is abso- The present volume contains 12 chapters. lutely unnatural; it has an implication, ap- The first deals with Admiralty organization parently, that the history of science is to be and tells of the changes made in 1917. The studied from the philological standpoint. No Admiral believes that specialists (which means one would question that philology does fre- scientific experts) should be part of the staff, quently contribute, but it can hardly be said not just attached. to represent a fundamental method in the history of science.

In the Army there is, except in regard to artilHistory of science, using science with the lery, little specialization. The training received inclusive meaning as in the title A. A. A. S., by an officer of any of the fighting branches of the is surely the proper name for the new section Army at the Staff College may fit him to assist in now under way.

the planning and execution of operations, provided Louis C. KARPINSKI.

due regard is paid to questions of supply, transport, housing, etc. This is not so in the Navy.

He proceeds to show that naval officers are SCIENTIFIC BOOKS

quite a different order of being from land The Crisis of the Naval War. By Admiral of officers. Further discussion of this view may

the Fleet, VISCOUNT JELLICOE OF SCAPA, be omitted here. But the Admiral preaches G.C.B., O.M., G.C.V.O. 259 pages; 8 plates, sound gospel, so far as men of science are oon6 charts and appendices. George Doran Co. cerned, when he says: 1921.

Human nature being what it is, the safest proThis is a companion volume to Admiral

cedure is to place the specialist officer, where his Jellicoe's “ The Grand Fleet, 1914-1916

voice must be heard, that is, give him a position on

the staff. which was reviewed in these columns. The meeting in battle of the fleets of Great Britain

Some rather forceful remarks follow to the and Germany was in its essence, a try-out of

effect that various divisions are not to work scientific methods of annihilation, as developed in water-tight compartments, but must be in by the leading scientific nations of the world. close touch with one another. It was said of the earlier volume that the book We notice that in the Admiralty reorganimight aptly carry as a sub-title “Science zation, Afloat up to 1916."

The well-known electrical consulting engineer The present volume gives developments dur- . ., has consented to serve as director of Experiing 1917. It is not the story of a great fight ments and Research, at the Admiralty-unpaid. like Jutland; but of undersea warfare, in We italicize one word and refrain from comwhich the submarine, like an assassin, struck ment. from behind or below. Warfare on the sea had' Chapter II. gives the general features of changed materially; and battleships needed the Submarine Campaign in the early part of screening from torpedo and mine, equally 1917. We are let in on certain state secrets; with transport and merchantman. One may well ask at this point, “Was Jutland” (in

Experienced British officers aware of the ex

tent of the German submarine building program, some respects the greatest naval battle ever fought; but on the whole the least decisive and

and above all aware of the shadowy nature of our

existing means of defense against such a form of most unsatisfactory) “ the last great sea

warfare” realized that the Allies were faced 1 SCIENCE, N. S., Vol. L., No. 1279, pp. 21-23, with a situation fraught with the very gravest July 4, 1919.

possibilities."

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Throughout the chapter and also in later their arduous and perilous work was carried out. chapters we are given clearly to understand These fine seamen though quite strange to the that the enemy submarine campaign was the

hazardous work which they were called upon to gravest peril which ever threatened Great

undertake quickly accustomed themselves to their Britain.

now duties; and the Nation should ever be full of

gratitude that it bred such a race of hardy, skilChapter III. tells of Anti-Submarine Opera

ful and courageous men as these who took 80 tions; and while the volume lacks a dra

great a part in defeating the greatest monace with matic climax, like Jutland, the reader whose

which the Empire has ever been faced. blood runs faster because of heroic deeds, can find in this chapter stirring records of courage

The references to the American Navy, and

in particular to Admiral Sims, are most comand defiance to the end, by the officers and men

plimentary. The laying of the mine barrage on decoy ships, drifters, trawlers and mine

from Scotland to Norway indicates how far sweepers. Chapter IV. describes the Introduction of

modern warfare at sea has changed since the

days when Captain Maban wrote his treatise the Convoy System. There were not enough

on “ Sea Power." destroyers to give adequate protection. Re

· In the future, the seaplane, greatly develquests for protection came from every quarter, but “the vessels wanted did not exist."

oped of course from its present stage, will be At the end of February, 1917, the enemy had

the effective unit, both in offense and defense.

With perhaps more truth the words of the 130 submarines of all types in home waters

Admiral regarding specialized training will and 20 in the Mediterranean.

hold for officers of the Air Service A very serious situation followed the sink

ALEXANDER MOADIE ing of 60 many tankers or fuel oil ships. These vessels of great length and slow speed presented the easiest of targets for a torpedo

Diseases of Economic Plants. By F. L. from a submerged submarine. The reserve of

STEVENS. New York, The Macmillan Com

pany. oil became so perilously low that directions were issued limiting the speed of warships

This is a revised edition of a former work burning oil.

under the same title by Stevens and Hall. Other chapters describe the effect of the

It will be welcomed not only by the proentry of the United States, the Patrol Craft

fessional botanists, but also by a very large and Minesweeping, Production at the Admir

number of teachers, county farm demonalty-and the Future.

strators and others who are finding plant The impression left on the reader is that the pathology a subject of increasing interest and big fleets, big guns and big ships were to a

importance. The importance of plant diseases

and the very rapid progress of plant pathology certain degree side-tracked; and that the smaller units did most of the work and were

makes frequent revision of a work of this the effective factors in winning the war. The

kind imperative. The general plan of the Admiral clearly indicates this in an eloquent

work is very similar the iginal edition

but is somewhat enlarged and has been passage on page 188.

brought up to date. The author pays a I regret very deeply that in spite of a strong pleasing tribute to our American workers by desire to undertake the task, I have neither the information nor the literary ability to do justice

inserting the pictures of Farlow, Burrill, to the many deeds of individual gallantry, self

Halsted, Bessey, Atkinson and E. F. Smith, sacrifice and resource performed by the splendid

who are so well known to all students of officers and men who manned the small craft. No mycology and plant pathology. words of mine can adequately convey the intenso The discussions are arranged with reference admiration which I felt and which I know was to the crops on which the diseases occur. The shared by the whole Navy for the manner in which diseases are grouped mostly with reference to

1

the crops on which they occur and are sub- mosome as being of the X-O type but recent divided into diseases of major and minor investigations in this field by the author inimportance. This arrangement is especially dicate that the X-Y type of chromosome may serviceable to those who are not specialists on be more common than is generally thought plant diseases. The descriptions of the symp

In the opossum, an animal for which the toms are brief, clear and very readable. There

X-0 type of sex-chromosome has been de is no attempt whatever to discuss the organ

scribed, the writer finds a typical X-Y sexisms which are the causes of these diseases

chromosome complex. Both the X and Y combut references are given to some of the more

ponents may be recognized in spermatogonial important publications. Each disease is desig

and somatic divisions because of their disnated by its common name; the scientific

tinctive size. In the first maturation division name for both the imperfect and the perfect

the X and Y elements segregate apart to stages, where known, are placed in parenthesis. The book also contains chapters on

opposite poles of the cell, and in the second

maturation division both divide equationally. the history of the subject, damages due to

Hence half of the sperm carry an X and half plant diseases, prevention and cure, general diseases which attack a large number of

carry a Y chromosome. crops, fungicides and soil disinfection. The The diploid chromosome number for both chapter on cost of spraying which was in the the male and female opossum is 22, and not first edition is very properly omitted since 17 or 24 as concluded by previous investithis is a varying factor dependent on cost of gators. materials and labor.

In the testes of both the white man and the The work is intended primarily as a text- negro I have found in the first spermatocytes book and it will prove of great service to all a chromosome pair which is similar in appearteachers of plant pathology. Possibly its ance and behavior to the X-Y chromosome of greatest value lies in the brief, clear descrip the opossum. The two members of this pair, tions which are of such great importance in in the human, representing the X and Y making diagnoses of diseases in the field. The

components, are unequal in size; they segrestudent of mycology will also find it an

gate apart in the first maturation division just important supplement for his work on eco

as in the case of the opossum. nomic forms. The horticulturists, nursery- It will be of general interest to biologists men, county farm demonstrators, progressive

to know that the diploid number of chromofarmers and in fact all others who are

somes for man is very close to the number interested in the applications of agriculture

(47) given by Winiwarter.?

In my own will find it an extremely useful reference

material the counts range from 45 to 48 apbook.

parent chromosomes, although in the clearest The mechanical make-up of the work is

equatorial plates so far studied only 46 chrogood except for the crowded arrangement of

mosomes have been found. Before a final the bibliography which would lead any one

conclusion is made on the exact number it is who uses it to fear that the supply of paper is exhausted.

desired to make a careful study of a large MEL T. Cook

number of division plates. There can be NEW JERSEY AGRICULTURAL

absolutely no question, however, but that the EXPERIMENT STATION

diploid number of chromosomes for both the

white man and the negro falls between 45 and SPECIAL ARTICLES

48. With the X-Y type of sex-chromosome we THE Y-CHROMOSOME IN MAMMALS

1 The writer's work now in press. The majority of workers on mammalian 2 Winiwarter, H. von, 1912, Arch. de Biol., spermatogenesis have described the sex-chro- Vol. 27.

may expect an even number, that is, either 46 eral business meeting held Tuesday morning, or 48.

April 26, Charles F. Chandler and William H. My material to date includes the testes of Nichols were unanimously elected honorary one white man and of two negroes. All indi- members of the society. The chief public adviduals were castrated because of self abuse, dress was given at Convention Hall on Wedat one of the Texas state institutions. The nesday evening, April 27, by Charles F. testes were removed with the use of local Chandler, on Chemistry in the United anæsthetics and immediately preserved in States.” At the general meeting on Tuesday. Bouin's fluid, to which chromic acid and urea afternoon, the following general papers were had been added. In less than a minute after presented: removal from the body the germ-cells were

Ammono carbonic acids," by E. C. Franklin. being bathed in the fixing fluid. The preser

“The measurement of color," by C. E. K. vation thus obtained is very satisfactory.

Mees. In view of the uncertainty which has ex- “Blue eyes and blue feathers,” by W. D. isted regarding the chromosome number in Bancroft. man, the author will gladly send samples of "Surface Films as Plastic Solids,' " by R. E. this human material to any experienced

Wilson. cytologist in order that the latter may verify

"The relation between the stability and the for himself the correctness of the chromosome

structure of molecules,” by Irving Langmuir. counts given. The complete spermatogenesis

“Ionization of electrolytes," by G. N. Lewis. of man is being reworked by the writer at the The following divisions and sections met: present time and his results will be published

Divisions of Agricultural and Food Chemisin the near future.

try, Biological Chemistry, Chemistry of MeTHEOPHILUS S. PAINTER

dicinal Products, Dye Chemistry, Industrial

and Engineering Chemistry, Organic ChemUNIVERSITY OF TEXAS,

istry, Physical and Inorganic Chemistry, RubAUSTIN, TEXAS

ber Chemistry, and Water, Sewage and Sani

tation; Sections of Cellulose Chemistry, PeTHE ROCHESTER MEETING OF THE

troleum Chemistry and Sugar Chemistry and AMERICAN CHEMICAL SOCIETY

Technology. Further details of their meetings The sixty-first general meeting of the will be found in the May issue of the Journal American Chemical Society was held at

of Industrial and Engineering Chemistry. Rochester, N. Y., from April 25 to April 29, Tuesday evening was given up to dinners inclusive. The council meeting was held on and gatherings of various colleges and fraterApril 25, the general meeting on the morning nities. On Thursday evening the good fellowand afternoon of the twenty-sixth, divisional ship meeting, complimentary to the members meetings all day Wednesday and Thursday, of the Rochester Section, consisted of a dinand excursions on Friday. Full details of the ner in the Bausch and Lomb dining hall, folmeeting and program will be found in the lowed by a varied and interesting program May issue of the Journal of Industrial and consisting of music, vaudeville entertainment, Engineering Chemistry. The registration was motion pictures of the convention itself and 1,139, and 1,270 sat down to dinner at the good prominent members thereof, and a film shown fellowship meeting.

for the first time, picturing the operations of General public addresses were given by the Eastman Kodak Company. The scientific Senator James W. Wadsworth, Jr., on Some program was the most extensive ever presented Problems of National Defense,” and by Con- before a meeting of the American Chemical gressman

Nicholas Longworth, on - The Society and consisted of 280 papers. American Chemical Industry and its Need for

CHARLES L. PARSONS, Encouragement and Protection.” At the gen

Secretary

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