CASELLA-MILLER DEEP-SEA THERMOMETER. 



891 



Two hours later, the doors and windows having been opened, and 

 steam turned off, the instruments hanging from the same peg, bulbs on 

 a level, recorded: No. 1, 69°; No. 2, 09°. 5; No. 3, G9o.5; No. 4, 70° j 

 No. 5, G90 ; No. G, 630.5 ; No. 7, G80 ; No. 8, 07°. 



Test No. 4. — Baih of sea-tcater, GS^. 



The instruments were transferred from a cold bath, recording as per 

 column, to a bath of sea- water and recorded. 



Nos. G and 7 occupied full eleven minutes to get a correct record, 

 although each was within one degree ; No. G in nine minutes, No. 7 

 in eight. No. 8 was continued four minutes longer in the bath with no 

 change. 



A regular series of baths, each 5° lower than the other, was now 

 begun — the instruments being started from as near to a uniform point 

 as possible. No. G, having been broken, not included in all. 



Test No. 5. — Bath of G5o, starting from C9o. 



Test No. 6.— Bath of GOo. 



Test No. 7.— Bath of 55°. 



