NUMBERS AND MEASURES. 



(16) VARIOUS VALUES OF g IN GREAT BRITAIN. 



In accurate experiments it is customary to reduce to latitude 45, 

 where the acceleration due to gravity is taken as having unit value. 



Latitude. 

 45 

 50 

 51 



Standards' Office 51 29' 53 

 52 

 53 

 54 

 55 



57 

 58 



Ratio to acceleration at lat. 45, 



1-000 

 1-000 

 1-000 

 1-000 

 1-000 

 1-000 

 1-000 

 1-000 

 1-000 

 1-001 

 1-001 



0000 



4463 



5343 



57704 



6217 



7084 



7942 



8790 



9627 



0453 



1266 



DENSITIES OF MIXTURES AND NATIVE COMPOUNDS. 



The density of a solid or liquid is measured by the number of 

 grams in 1 ccm. of it. A cubic foot of water weighs 62*4 Ib. For 

 Elements and Artificial Compounds, see 80- Acids, sec 87. 

 Alcohol, see 88- Mercury, see 32. Water, see 31. 



Agate and Rock crystal 2*6 



Albite 2-6 



Alcohol (ethyl) 0795 



Aluminium bronze ... 8 



Amber 1*1 



Amphibole 2'9-3'4 



Anhydrite 2'98 



Anthracite 1-4-17 



Apatite 3'3 



Arragonite 2*95 



Ash-wood 0753 



Bamboo 0'4 



Basalt 2-8 



Beech-wood 0'69-'8 



Bitumen O'S-1'2 



Blood (human) 1'06 



Box-wood 0-96 



Bone 1-8-2 



Brass 8 



Brick 2-1 



Bronze (84 cop. 16 tin) 8'56 



Bronze coinage 8 '66 



Calamine 3 "4 



Celestiiie... ,. 3'9 



Chalk 



Chestnut- wood 



Chloroform 



Cinnabar 



Clay.... 



Coal (bituminous) 



Coral 



Cork 



2? 



0-535 



1-526 



92 



27? 



0-24 



Diamond 3*5 



Dolomite 2'9 



Ebony 1'19 



Elm... ,. 0-544 



