CORNELL UNIVERSITY. 



THE 



r.osutcli ||«. IFlotocr Hibrarg 



THE GIFT OF 



ROSWELL P. FLOWER 



FOR THE USE OF 



THE N. Y. STATE VETERINARY COLLEGE. 



X897 



THE METER FOR 

 LENGTH. . . . 



rs divided into 

 timeters. 



J, i-ioooths Meter; Micron 



i FO"/-'' I - IOO °th.s millimeter; the Micron is the unit in Micrometry (g 157). 

 {/HpTp/eter, 1000 "■■'■- : - 1 -' 



1000 Meters; used in measuring roads and other long distances. 

 the gram for {Milligram (m.g.), i-ioooths gram. 



weight. . . . \Kilogram, 1000 grams, used for ordinary masses, like groceries, etc. 

 the liter for f Cubic Centimeter (c.c), i-ioooths loiter. This is more common than the cor- 



capacity. . . I rect form, Milliliter. 



Divisions of the Units are indicated by the Latin prefixes: deci, i-ioth ; centi, i-iooth; Milli, 

 3-ioooth. 



Multiples are designated by Greek prefixes : deka, 10 times ; hecto, 100 times ; kilo, 1000 times ; 

 myria, 10,000 times. 



TABLE OF METRIC AND ENGLISH MEASURES. 



METER = ioo centimeters, iooo millimeters, 1,000,000 microns, 39 3704 inches. 

 Millimeter (mm.) = 1000 microns, T a 5 th millimeter, j^jth meter, ^th inch, ap- 

 proximately. 



Micron ( fi) (Unit of Measure in Micrometry) = j^^th mm. xu^j 

 (0.000039 inch) j-jJoTjth inch, approximately. 

 Inch (in.) = 25.399772 mm. (25 4 mm., approx.) 

 Liter — 1000 milliliters or icoo cubic centimeters, 1 quart (apprc x. 



ifth meter. 



Cubic centimeter (cc. or cctm. ) 



ffth of a liter. 



Fluid ounce (8 Fluidrachms) = 29 57S cc. (30 cc, approx. ) 



Gram =15 432 grains. 



Kilogram (kilo) = 2.204 avoirdupois pounds (2^111 pounds, approx.) 



Ounce Avoirdupois = (4375 grains) = 28.349 grams. 



Ounce Troy or Apothecaries = (480 grains) =31. 103 grams 



TEMPERATURE. 



(30 grams, approx 



To change Centigrade to Farenheit : (C. X 1) + 32 = F. For example, to find 

 the equivalent of io° Centigrade, C. = 10° (io°X i) + 32= 50 F. 



To change Farenheit to Centigrade : (F. — 32 ) X | = C. For example, to re- 

 duce 50° Farenheit to Centigrade, F. = 50°, and (50° — 32 ) X f = 10° C. ; or — 40 

 Farenheit to Centigrade, F. = — 40° (— 40 — 32 ) = — 72 , whence — 72 X I 

 = — 40 C. 



Address of American Opticians : For the price of Microscopes and Microscopical supplies, the 

 student is advised to obtain a catalog of one or more of the opticians named below For the cat- 

 log of foreign opticians, see addresses in the table of tube-length, p. 15. Nearly all import for- 

 eign goods. 



The Bausch & Lomb Optical Co., New York City and Rochester, N. Y. 



Eimer and Amend, 205-211 Third Avenue, New York City 



The Franklin Educational Co., , Harcourt St., Boston, Mass 



J. Grunow; 70 West 39th St., New York 



The Gundlach Optical Co., . Rochester, N Y 



Wm. Krafft, (representative of Leitz in America) 411 West 59th St., New York 



The Mcintosh Battery and Optical Co 521-531 Wabash Ave., Chicago, 111 



Queen & Co.. Incorporated 1010 Chestnut St., Philadelphia, Pa. 



Richards & Co., Limited, 30 E. 18th St., New York, 108 Lake St,, Chicago, 111 



Edward Pennock, 3609 Woodland Ave., Philadelphia, Pa 



Spencer Lens Co., 546 Main St., Buffalo, N. Y. 



Walmsley, Fuller & Co., 134-136 Wabash Ave., Chicago, 111 



Williams, Brown & Earle, 10th & Chestnut Sits., Philadelphia, Pa 



G. S. Woolman, (Queen & Co., in New York), 116 Fulton St., New York 



J. Zentmayer, • ■ • 209 South nth St., Philadelphia, Pa 



£■- 



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