FAHRENHEIT 



and 



CENTIGRADE 

 SCALES. 



F. 



500 

 401 



374 

 356 

 347 



811 

 302 

 284 

 275 



230 

 212 

 203 

 194 

 176 

 167 

 140 

 122 

 113 

 105 

 104 

 100 



98.5 



95 



86 



77 



68 



50 



41 



C. 



260 

 205 

 200 

 195 

 190 

 180 

 175 

 170 

 365 

 160 

 155 

 150 

 140 

 135 

 130 

 120 

 115 

 110 

 100 

 95 



50 



45 



40.54 



40 



37.8 



25 

 20 

 10 

 5 

 



- 5 



- 10 

 -15 

 -20 

 -25 

 -30 

 -40 

 -60 



1 deg.F. = .54C. 

 1.8 " = 1C. 

 3.6 " = 20. 

 4.5 " -= 2.5C 

 5.4 " = 3C. 



To convert de- 

 grees F. into de- 

 grees C., subtract 

 32, and multiply 

 by|. 



To convert de- 

 grees C. into de- 

 grees F., multiply 

 by |, and add 32. 



MEASUREMENTS. 



FEENCH INTO ENGLISH. 



LENGTH. 



1 metre 



10 decimetres I = 39.37 English 

 100 centimetres f inches. 



1,000 millimetres J (or 1 yd. and 3^ in.) 



1 decimetre ) 



10 centimetres V = 3.937 inches 

 100 millimetres ) (or nearly 4 inches.) 



1 centimetre ) = .3937 or about 

 10 millimetres f (nearly g inch.) 

 1 millimetre = nearly & inch. 



OR, 



ONE METRE = 39.37079 inches. 

 (It is the ten-millionth part of a quarter 



of the meridian of the earth.) 



1 Decimetre = 4 in. 



1 Centimetre = j% in. 



1 Millimetre = <& in. 



Decametre = 32.80 feet. 



Hectometre 109.36 yds. 



Kilometre = 0.62 miles. 

 One inch = 2.539 Centimetres. 

 One foot = 3.047 Decimetres. 

 One yard = 0.91 of a Metre. 

 One mile = 1.60 Kilometre. 

 The cubic centimetre (1 5.432 grains 1 

 gramme) is a standard at 4 C., the 

 grain at 16.66 C. 



WEIGHT. 



(One gramme is the weight of a cubic 

 centimetre of water at 4 C. at Paris). 

 1 gramme ] 



10 decigrammes i = 15.432349 grs. 

 100 centigrammes ( (or nearly 15^). 

 1,000 milligrammes J 



1 decigramme 

 10 centigrammes V = rather more 

 100 milligrammes ) than l^j grain. 



1 centigramme \ = rather more 

 10 decigrammes ( than 5 % grain. 



1 milligramme = rather more 



than 3 g,j grain. 

 OR 



1 Decigramme = 2 dr. 34 gr. 



1 Hectogrm. = 8^3 oz. (Avoir.) 



1 Kilogrm. = 2 Ib. 3 oz. 2 dr. (Avoir.) 



A grain equals about 1.16 gram., 



a Troy oz. about 31 gram., 



a Ib. Avoirdupois about ^ Kilogrm., 



and 1 cwt. about 50 Kilogrms. 



CAPACITY. 



1,000 cubic decimetres I = 1 cubic 

 1 ,000,000 cubic centimetres f metre. 



1 cubic decimetre ) 



or 5- = 1 litre. 



1,000 cubic centimetres } 



OR 



ONE LITRE = 1 pt. 15 oz. 1 dr. 40. 

 (For simplicity, Litre is used to signify 

 1 cubic decimetre, a little less than 1 

 English quart.) 



Decilitre (100 c.c.) = fy$ oz. 

 Centilitre (10 c.c.) = 2f dr. 



Millilitre (1 c.c.) = 17 m. 



Decalitre = 2 gal. 



Hectolitre = 22 gals. 



Kilolitre (cubic metre) = 27^ bushels. 

 A cubic inch = 16.38 c.c. ; a cubic foot 

 = 28.315 cubic dec., and a gallon = 

 4.54 litres. 



CONVERSION SCALE. 



To convert GRAMMES to OUNCES avoir- 

 dupois, multiply by 20 and divide by 567. 



To convert KILOGRAMMES to POUNDS, 

 multiply by 1,000 and divide by 454. 



To convert LITRES to GALLONS, nul- 

 tiply by 22 and divide by 100. 



To convert LITRES to PINTS, nit Itiply 

 by 88 and divide by 50. 



To convert MILLIMETRES to INCHES, 

 multiply by 10 and divide by 254. 



To convert METRES to YARDS, multi- 

 ply by 70 and divide by 64. 



SURFACE MEASURE. 



1 square metre = about 1550 sq. inches. 

 Or 10.000 sq. centimetres, or 10.75 sq. ft. 

 1 sq. inch = about 6.4 sq. centimetres. 

 1 sq. foot = " 930 " 



ENERGY MEASURE. 



1 kilogrammetre=about 7.24 ft. pounds 

 1 foot pound = " .1381 kgin. 

 1 foot ton = " 310 kgm. 



HEAT EQUIVALENT. 



1 kilocalorie = 424 kilogrammetres. 



ENGLISH 



Apothecaries Weight. 



7000 grains = 1 Ib. 



Or 

 437.5 grains = 1 oz. 



MEASURES. 



Avoirdupois Weight. 



16 drams = 1 oz. 

 16 oz. = 1 Ib. 



28 Ibs. =. 1 quarter. 



4 quarters = 1 cwt. 

 20 cwt. = 1 ton. 



Measure of 1 decimetre, or 10 centimetres, or 100 millimetres. 



1234 567 



The micron (symbol, M) IB the unit of microscopic measurement = 



796 



