« iepriekšējāTurpināt »
A. D. L.
After two years of careful research and experimentation, Arthur D. Little, Inc., announce the contribution to the list of American-made chemical products of
A. D. L. Quantitative Filter Paper
A. D. L. PAPER IS MADE WITH DISTILLED WATER, is doubleacid washed, and is subjected to a system of rigid inspection and testing which insures a high degree of uniformity. It is made by chemists for chemists, to meet the most exacting demands of accurate analysis.
A. D. L. PAPER RETAINS BARIUM SULFATE and other fine precipitates without sacrificing the advantages of rapid filtration.
A. D. L. PAPER HAS AN EXCEPTIONALLY LOW ASH CONTENT. It is strong and easily folded.
A standardized series of tests, developed in our own labora“ tories and under the control of which our manufacture is conducted, show A. D. L. Quantitative Filter Paper to be equal, or superior, in the more important physical characteristics to the best imported filter papers. Correspondence with chemists as to the performance of our filter paper or its suitability for specific purposes is solicited.
The underlying motive in this undertaking has been to utilize our intimate professional experience in the scientific development of paper making in the United States by adding a new and important item to the production of American chemical industry. The distribution of the A. D. L. Quantitative Filter Paper has, therefore, been placed in the hands of reliable dealers throughout the United States, to whom orders, requests for samples, and prices should be addressed.
Made at 30 Charles River Road, Cambridge 39. Mass., U.S.A.
in the laboratories of
Arthur D. Little, Inc.
Chemists :: Engineers :: Managers Repeated object lessons have demonstrated that nearly all progress in science has resulted in important advances in industry
G-E Research Laboratory
Schenectady, N. Y.
Among the many products developed by the General
For further information address Supply Department, Schenectady Office.
Sales Offices in all large cities
BRODIE-STARLING KYMOGRAPH. New model for driving by independent motor or from the main laboratory shafting to a large cone pulley with a three-speed gear, permitting a large range of speeds for the main shaft, from which the drive is conducted by two cone pulleys to two worm gears, the one giving a fast rate, the other a slow. By a special clutch operated by a lever at the side of the drum, either of these gears can be made to rotate the drum. The increase in passing from one speed to the next faster is about 55 per cent., and with a single speed of the main driving shaft, the fastest speed of the drum is about twenty-four times greater than the slowest. 42812. Kymograph, Brodie-Starling, as above described, including smoking apparatus and mounted on a strong
pitch pine table with top of teak, 51 x 24 inches. A large drawer is fitted under the table, which is
about the laboratory.
$594.00 42813. Ditto, but without table, for mounting on a table in the laboratory. Duty Free... ... $396.00 Duty Paid...
$486.00 Pricos subject to change without notice
ARTHUR H. THOMAS COMPANY
WHOLESALE, RETAIL AND EXPORT MERCHANTS LABORATORY APPARATUS AND REAGENTS WEST WASHINGTON SQUARE
PHILADELPHIA, U. S. A.
Scientific Events :
The Medical School of Columbia University and the Presbyterian Hospital; Gifts by the Carnegie Corporation to Carnegie Institutes at Pittsburgh; Meetings of British and American Chemists; Organization of Members of the American Association at the Pennsylvania State College..... 529
Many of you who have lately become familiar with Mr. H. G. Wells’s interpretation of history will realize new significance in the fact that children are born into a world that is already old. For many thousand years before our generation men were experimenting with Nature, with social, economic, political, and religious ideas and practices. Our civilization to-day is the forward-borne product of this slowly and painfully acquired experience of the race.
The whole educational process, broadly seen, is the problem of putting our young people in touch with the more outstanding results of this age-old accumulation and of giving them exercise in the most direct thought processes by which this experience and knowledge have been acquired; processes by which experience and knowledge may be enlarged and extended.
The education of boy or girl, therefore, consists in bringing them up to the present day, so that they can enter independent life as useful thinkers and doers in the world as it is. Dreams of what the world ought to be are not only stimulating but indispensable to human progress, but each generation must begin building on the world as it finds it.
Expressed otherwise, our educational effort
1 Given by Dr. Ernest Fox Nichols on the occasion of his installation as president of the Massachusetts Institute of Technology.
is directed to give
young man of intellectual the strategic years of education. It is in this interests and possibilities the main features of period that wisely directed teaching can do his racial background and especially to ac- most to integrate and interpret this backquaint him with the best and most significant ground, do most to give it unity of form and things which have been thought and done in grouping, color, symmetry, and depth. Durthe world, so that at maturity all new things ing this formative period no great department which present themselves to him, he can in of human experience can be safely ignored, some measure appraise in their relations to if our purpose is to train adequately educated this background.
men and women. I know no better measure of a man's real The department of human experience and education than the adequacy of his thought action on which the major emphasis shall fall and action in whatever actual situations he is a matter wisely left to the individual prefmay find himself, for adequacy of thought and erence, aptitude, and taste of the student. In action imply some hold on world experience. schools of technology this emphasis falls natOur daily use of the phrase common sense urally on the study of science. But studies in has no other meaning.
science can be made as narrow as can studies Vital possession, conscious or unconscious, in philosophy and the arts. Narrowness of of this world background enables a man sanely outlook, always a major defect in our efforts to face and interpret reality. You rarely find at education, we must strive unceasingly to such a man seriously occupied in chasing rain- avoid. All fields of knowledge and experience bows or fighting windmills. His chief mental form a whole, and, in our teaching, their vital characteristics ars breadth, balance, sanity. interdependence must be most clearly emphaTo train such men and women should be the sized. dominant ideal of the educational process. With his characteristic grasp of essentials, How often and how far, alas! do we fall short
President Nicholas Murray Butler has stated of attaining it.
these traits of the educated man: (1) CorrectMr. Chesterton's recent amusing raillery at “ The ignorance of the educated ” would lose
ness and precision in the use of English; (2)
refined and gentle manners; (3) power of renone of its charming humor and would gain in truth and pungency if he changed his title flection; (4) power of growth; (5) sound stanto “ The ignorance of the half educated.” dards of feeling and appreciation; (6) the These are the really dangerous men, for they ability to do efficiently without nervous agiare facile of speech and wholly unaware of tation. To these I venture to add yet another their intellectual limitations. By contrast the trait of the usefully educated man: Power to adequately educated man knows always just
marshal the world's experience in at least one where he stands. Ought not an engineer to
field, and to use it effectively for further conknow enough of philosophy and its uses not
structive achievement. to be misled into dogmatizing upon its technical intricacies: and should not a philosopher
Engineers have, surely, the same broad, edube taught enough about bridges and dy nos
cational rights and responsibilities as other to be satisfied with dwelling on the broad sci
professional and non-professional men, yet, entific principles they illustrate without ven
amid the growing complexities and perplexituring to criticize minor details of construc- ties of technical education there has been, tion?
and is, a steady and strong temptation to inEducation interpreted as a background troduce more detailed technical courses at the builder is far wider than the schools and expense of other background building studies. stretches endlessly from the cradle to the This temptation, weighty as are the arguments grave. Yet a careful scrutiny of the course for yielding to it, must nevertheless be steadily of individual development shows that in the and firmly resisted. The problem of modern latter half of the period of adolescence, say technical education is indeed most intricate from eighteen to twenty-five years of age, lie and difficult, but other solutions must be