L. Waldo—Papers on Thermometry. 61 
was measured twice. The resulting means were expressed in 
terms of hundredths of one division of the eye-piece microm- 
eter, and gave a subdivision of about  agigy an : 
in the cases of Kew 578, 584 and 585 respectively. There were 
about 2300 separate micrometer readings made, and the result 
of the reductions shows that no sensible accidental errors have 
been introduced into the graduations of these standards. The 
meter readings, and with the exception of the freezing point 
determinations succeeding the boiling point determinations in 
the same day, the freezing points were observed after a long 
exposure (48 hours or more) to a temperature of freezing. 
Correction at Correction at 
Thermometer. Date. 1880. freezing point. boiling point. Remarks. 
Kew 578 Nov. 25 0°-00 (ie em 
Dee. 1 0-00 Gass 
wine. Ueek +0°°01 Apparatus VII. 
aes +0°18 tga 
5" sed +0°04 de ha 
“2.6 Seay +0°03 “¢ VII. 
Kew 584 Nov. 25 +0°10 F. Sako : 
a OG AU les +019 F me VI. 
36 +0°38 et 
prem ge dt eee +0°19 r VI. 
~~ ae Beran + 0°20 f VI. 
hs Bro -88 + 0°22 és VI. 
Dec. 1 ges +0°21 te VIL. 
i +0°32 proces 
Kew 585 Oct. 16 0°00 Eee 
Nov. 2 Sut +015 3 VI 
: +0:10* oo 
ee Peis + 0°15 “ V 
#30 i +015 iy Vi 
Dee. 1 4+ 0:22 +0°11 & Vil 
ar +0°22 
[To be continued.] 
