18 



PROF. HUGH L. CALLENDAR AND MR. HERBERT MOSS 

 .Sm< J.Obtfrcatwnt 20 0. to 187 C. (continued). 



Shortly aftr the conclusion of the last observations at 187 C., in attempting to 



vat-o,, at a temperature above 200 0., the mercury was observed to be 



1 * gauge at the rate of about a tenth of a millimetre in 10 minutes. 



* hen the apparatus was cold, the level continued to fall at the rate of about 1 



cm. 



