in the type and arrangement noted. The outer cor ner of each page will bear the page number in 10point type, and the inner corner will bear the legend Vol. No. in case of the even-numbered pages, and in case of the odd-numbered pages. This matter will be set level with the page heading, and two ems from the edge of the rule, the latter being the width of the three-column type body. USE OF NUMERALS. IN GENERAL, A.-USE NUMERALS FOR ALL NUMBERS EXCEEDING 12, and B.-SPELL OUT ALL NUMERALS FROM ONE TO TWELVE. The exception to A is only where round numbers are used in a vague sense, as in "a thousand men taken at random," or "five hundred different reasons may be given," where they should be spelled out. The exceptions to B are as follows: USE NUMERALS FOR NUMBERS 1 TO 12 ONLY AS FOLLOWS: B1. When the number is followed by a decimal or vulgar fraction. Never spell out 12, 24, etc. B2. When the number is followed by a word having an authorized abbreviation, as "2 ft.," "6 oz.,' "1 in." EXCEPTING when the statement is vague in its nature, as when the word "about" is used or implied, as in "some six feet beyond," when spell out. B3. In a series of two or more connected or contrasted numerical statements, if some of the numbers must be numerals under rule A, use numerals for all as "2 men were killed and 16 or 18 injured." B4. In a series of connected numerical statements where precision is implied, use numerals only; as "2 foremen, 7 masons, 8 laborers." EXCEPTING that when vagueness is implied, and the numbers are all below twelve, spell out, as in "six or seven miles," or "two men were killed and six or eight injured." B5. In Construction News use numerals in such expressions as 7-story building, and 3-mile railway. RULES FOR THE SEPARATE DEPARTMENTS. TABLE OF CONTENTS-Nonpareil leaded. ENGINEERING NEWS NOTES.-Nonpareil leaded, first words in caps as underlined. PERSONALS.-Nonpareil leaded. One lead between items. "Mr." or other titles to precede name. ENGINEERING SOCIETIES.-To have a nonpareil cap, side head for name of Society. BOOK REVIEWS AND TRADE PUBLICATIONS to be set in this style: POCKET BOOK OF MECHANICS AND ENGINEERING.Containing a Memorandum of Facts and Connection of Fact and Theory. By John W. Nystrom, C. E. Eighteenth Edition, Revised and Greatly Enlarged. Philadelphia: J. B. Lippincott & Co. Leather; 4x6 ins.; pp. 671; 114 tables, 17 plates, and 321 figures in the text. $3. Then proceed with review, which for the Literature Supplement will be set in minion lead; for Trade Publications in nonpareil leaded. The number of illustrations, etc., need only be given if they are consecutively numbered in the volume. In Engineering Literature Supplement the headings will be as follows: CORRESPONDENCE. Books on Cement. That is all main divisions in De Vinne caps and all titles in D. V. c. & l. c.* AUTHORIZED ABBREVIATIONS. (Do not use abbreviations of QUANTITY except when numerals are used. Write "1,000 ft." or "a thou Chas. (followed by surname.) cm. centimeter. c. m. circular mils. Co. company (preceded by name in capitals.) Col. (followed by name.) cu. ins.. cu. ft.. cu. yd., etc. cu. m. (cubic meter), cu. cm., cu. mm. (c. c. may be used when bacteria per cu. cm. are meant.) cwt. Do NOT use. d. pence. Dec. (followed by numerals.) diam. (in some cases; use optional; follow copy.) deg. not to be used. Use O symbol. O · " degrees, minutes and seconds (for angles.) Dr. Doctor, followed by name. F. (Fahrenheit) for degrees. C. (Centigrade) of temperature. 'R. (Reaumur.) e. g. for example (if in copy.) E. HP. electrical horsepower. Eff. HP. effective horse-power. E. M. F. electro-motive force. Eng. News, preceding refer ences to issues or pages, etc. (not &c.) et seq., and following (if so in copy). Feb. (followed by numerals.) Fig. (followed by a numeral.) fr. franc. francs. ft. foot, feet.* gal.; gals. gallon (s). Gen. (followed by name.) Geo. (followed by surname.) h. hour, in combination with "min." or "sec." as "2 h. 20 min.," but spell out for "22 hours," etc. H. M. S. (preceding names of British ships.) Hon. (followed by name.) HP. horse-power; also I. HP. and E. HP. HP.-hr. horsepower-hour. a. p. high pressure (followed by the word cylinder.) 1. u. heat units (also B. T. U. when so in copy, as above.) [-beam (use the regular font cap I. Do NOT write I-bar or eye-beam. e. (if in copy; use Roman 1. c.) 1. HP. indicated HP. n. (ins.) inch, inches.* [as. (followed by surname.) *In such expressions as "14-in. fan. (followed by numerals.) kilo. (kilos.) kilometer. g. kilogram. VA. Kilovoltamperes. KW. kilowatt (s). KW.-hr. kilowatt-hour. Lieut. (followed by name.) lb. (lbs.) 1. p. low pressure (followed by the word "cylinder"). lin. lineal (ft., yd., etc.) M. Do NOT use for Mr. M. thousand. m. meter (or spell out if so in copy.) M. E. P. mean effective pressure. mm. millimeter. M. C. B. Master Car Builder (following a name or if so in copy.) M. ft. B. M. thousand feet (Board Measurement.) mi. mile. Should be used only exceptionally. mi. per hr. miles per hour. May be used exceptionally. min. minutes of time (in connection with the abbreviation "h.' 99 or "sec." only as in "2 min., 20 sec.' For minutes of angles use mos. months (if so in copy: but never (mo.") except in series.) MS. manuscript. Nov. (followed by numerals). p. page, numerals following. % per cent. (except in editorials.) Prof. (followed by name.) pdr. (after numerals, referring to ordnance.) p. m. afternoon. Pub. doc. (in reviews.) qt. (qts.) quarts. r. p. m., revolutions minute. per R. R. Railroad, Ry. Railway (after name of companies.) r. f. rapid firing (in lists of ordnance.) S. shilling (in compound expressions like 2s. 3d. only.) sec. (of time in such com. pound expressions as "2 min. 15 sec. only; never use "15 sec." alone. For seconds of angular arc use ".) "' etc.. Hyphen gun," "40-yd. course," use the hyphen and the singular form of the abbreviation. also 4-in., 2-yd. where there is no whole number. The following extra abbreviations are regularly used in Construction News: Boro. Engr. Borough Engineer. Bldg. Building (following name.) Chn. Chairman. Ch. Engr. Chief Engineer. Clk. Co. Clerk of committee. City Recdr. City Recorder. Com. Committee. Comn. Commission. Comr. Commissioner. Comrs. Commissioners. Comr. Pub. Wks. Commissioner Public Works. Consult. Engr. Consulting Engineer. Constr. Engr. Constructing Engineer. Dept. Department. Dept. Pub. Impvts. Department XIX INDEXING AND FILING THE CARD INDEX The card index system is now so generally known, so widely advertised, and so variously used that little explanation of it should be necessary. Record cards can be used to advantage for almost any purpose in which there is listing and arranging to be done; the system is also adaptable to many varieties of office and field work requiring individual isolation of items. It should be thoroughly understood by every student and can easily be mastered by a study of the catalogues of any of the many supply houses which are now advertised in all periodicals and represented in almost every part of the country. For individual use a card index will save overtaxing the memory in a hundred ways; it can be used to record facts pertaining to reading, household affairs, experiences, anecdotes and facts learned in conversations, correspondence, drawings, newspaper clippings, addresses, engagements, accounts, business matters of all kinds, etc. A "Card Index File" consists essentially of cards and a case. There are variously sized and ruled cards; ‘tab cards' of various designs for |