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...Introduction to Autobiography-Sheridan House ($5). A book about autobiographies (410 of them in 23 languages), indispensable to libraries, for whom it is available in microfilm as well as book form. In microfilm, this 713-page, 5-lb. volume, is only 48 feet of 16 mm. film (the width of home cinema film) reeled into a spool the size of a typewriter ribbon, with its tin container weighs one-quarter pound. Microfilm copies of rare books are used in many libraries; this is the first new book to be issued in that form...
...considerable improvement on printing from a typewritten sheet was made possible last week by International Business Machines Corp. I. B. M. has a new electric typewriter which uses 12-point Roman type and whose carriage automatically advances different spacings to allow each letter in the alphabet the width required by good type design. (Each typewriter letter is the same width.) Thus, capital W gets eight units of space, lower-case i or I only two units. The machine uses a 300-ft. paper ribbon, which runs through only once, thus keeping the copy uniform in blackness. There is also...
Explanation; Fm vechicular flow on Main St.; for "peak hour"; Fc=ditto on Cross St.;Lm=left turns from Main St.;Lc= ditto from Cross St.;Pm= pedestrian flow across Main St.; rc = ditto across Cross St -Wm= Width of Mam St.; W. -width of Cross St; Sh -average speed of vehicles going faster than critical approach speed; So critical approach Speed K = derived constant; Wk -standard width of roadway; A = arbitrary values for special conditions; IR = composite intersection rating...
...miles (mean: 235,000 mi.). This condition occurred this week. When the sun is farther away than usual, the shadow cone beyond the moon is longer; and when the moon is closer to earth than usual, the earth intercepts a thicker section of the cone. The maximum possible width of an eclipse path is 167 miles. At its noon point the shadow path of this week's eclipse was 153 miles wide...
...vehicles reported on each street from 7:00 o'clock in the morning to 7:00 o'clock in the evening are being tabulated in a large diagram called a "flow map." Eight feet square, the flow map indicates the volume of traffic on any street by the width of that street on the map. Hence, on a preliminary scale drawing of the map, Massachusetts Avenue was drawn at least five times as wide as Holyoke Street...