310 



Mr. J. B. Haiinay. 



into the interior of the working- tube by melting a small piece of sili- 

 cate of soda, and causing the tube to adhere : but this was found to be 

 disadvantageous, as the tube almost invariably burst where the silicate 

 was adhering. The method latterly used was simply to make an 

 obtuse-angled bend on the tube, so that the piece of capillary tube 

 could not pass beyond this, but became wedged. The capillary height 



was mea.su rod bv a 



cathetometer in the 



usual manner. 





The 



foUowing table 



gives the results : 













Table IX. 









Capillary Height of Alcohol. 











Manometers A" and B". 





T 



T'. t. 



j.f 



P. 



f. r. r 



Lap. nt. 



1U o 



10 5 .. 









K £ A 



.... 5o4 



lr 



19 16 



i <? 

 l -.1 







.... 557 



o4 



34 16 



10 



*5 . . ~. 





C A A 



.... 540 



r 4 



53 -8 IS -5 



lo 



*5 . 





.... 513 



w 



D/ 



67 15 



1 ^ 



lo 







.... 4b7 



M 



80-5 16 



lo 







.... 4oo 



OA 



90-2 17 



-I - 



1 1 







A KA 



.... 4o0 



1 AQ 



108 16 



10 







42o 



1 oo 

 L__ 



122 18 



1 1 







4 A.I 



.... 402 



1- i 



127 18 



is 







.... 38o 



lot 



136-5 20 5 



20 







.... 3/4 



140 



145 23 



23 



80 



16 



.... 358 



loo 



154 -2 27 



2 1 



92 



16 



.... 334 



166 o 



166-5 35 



34 



112 



16 5 



.... 300 



172 



173 42 



40 



137 5 



17 



.... 264 



186 



186 53 



50 



.... 165 



17 



238 



192 



193 60 



60 



.... 185 



16-5 



.... 211 



195 



195 60 



61 



189-5 



27 16 -5 



.... 194 



202 



202 65 



66 



199 



52 16 -5 



.... 179 



205 



205-5 70 



72 



204 



83 16 



.... 161 



209 



210 70 



70 



206 



90 15 -5 



.... 141 



214 



214 72 



75 



208 -5 107 15 



.... 127 



220 



220-5 75 



75 



210 



115 17 



84 



225 



224 5 78 



78 



.... 211 



118 5 17 



49 



229 



230 -5 79 



80 



212 



123 17 



k 



From this table 



curves Xos. I, tig. 



2, and IX, fig. 3, have been 



drawn 



while Table 



X 



gives the corrected values for capillary height 



under the pressure 



of alcohol vapour. 



The numbers 



expressing the 



pressure of the vapour at temperatures below those at which the mano- 

 raeters used began to register are taken from Regnault's observations. 



