List of measured cylinders and Ley den jars 299 



The 2 nd column is weight required to balance it in that position. 

 The 3 rd is the same thing in the 2 nd trial. 



The 4 th is the difference of these numbers, or bulk of intermediate portion 

 of glass. 



The 5 th is the same thing in 2 nd trial, and 



The 6 th is the mean between them. 



The 7 th is the circumference in the middle of that space. 



[after this a table for the narrower half of I st cylinder, and in M. 7 for 

 2 nd , 3 rd and 4 th cylinders. M. 8 and M. 9 is a table of n columns. 

 I st column, distance from mark. 

 2 nd Mean loss [of weight] for 2 inches. 

 3 rd Suppfosed] mean circumference. 

 4 th Log. loss. 



5 th Log. supp. circumference]. 

 6 th Log. thickfness] x p. 



7 Thick, x py> = ratio of circumference to diameter]. 



8 True mean circ. * 



9 Log. do. 



10 Log. comp. power of i inch. 



11 Comp. power of i inch.] 



M. io. Measures of the circumference and substance of glass in jars and 

 cylinder. 



Marks with file are made at the extremities of the whole space, and the 

 numbers begin with the space marked with double mark. 



* By mean circumference is meant the mean between the inside and outside 

 circumference. 



