the Viscosity of Liquids, 459 



A. Mass of mercury taken, '03737 grm. This was divided 

 into 12 parts — a, l>, c, d, &c. . . . I. 



Greatest variation in temperature during a single obser- 

 vation = '01° C. 



Greatest variation in temperature during whole interval 

 = •03° 0. 



Length of path employed, 50*28 centim. 



Ordinary watch used to determine time. 



Mean temperature, 18°*28 C. 



Mass. 



Mean 

 temp. 



Time. 



Time 

 corrected 



3. 



v 2 . Mass, m. 







to 18°-28 C. 











seconds. 



seconds. 





grm. 





18-27 



128-2 



128^0 



-2462 



003516 



b 



18-27 



121-4 



1212 



•2672 



003815 





1827 



135-2 



1350 



•2273 



003245 



d 



1827 



132-4 



132-2 



•2346 



003349 





1827 



1172 



1170 



•2817 



004022 



/ 



18-28 



137-8 



1378 



•2204 



003146 



g 



18-29 



1972 



197-4 



•1285 



001835 



h 



18-29 



148-6 



148-8 



•1963 



002804 





18-29 



160-8 



1610 



•1746 



002492 



3 



18-29 



131-2 



131-4 



•2367 



•003380 



k 



18-29 



1360 



136-2 



•2244 



•003204 



1 



18-29 



157-8 



158 



•1795 



002564 



2=2-6174 S= 



037372 



Taking 



<t= 13-59 and p = l*26, 



#=981, 



^83-9xl2-33( 13 . 5 ^ 2 , 617 ) i , 



= 10*69 for the mean temperature 18 c *28 C. 



B. Mass of mercury taken, *1096 grm. This was divided into 

 10 parts. 

 Greatest variation in temperature during a single obser- 

 vation = *07°C. 

 Greatest variation in temperature during whole experi- 

 ment = *22° C. 

 (This result is therefore not so reliable as the previous one.) 

 Mean temperature, 4° - 35 C. 



Siemens chronograph employed to measure time. 

 Length of path employed, 50*28 centim. 



2 12 



