74 Speyers — Heat of a Change in Connection with 



Collecting for discussion, including the vaporization data, we 

 have 







A 



A' 





140 





+ 



44 



1936 



140-72= 68 



1V5 





+ 



79 



6240 



175 — 72 = 103 



154 





+ 



58 



3364 



154 — 72= 82 



44 



+ 4 







52 



2704 



44 + 72=116 



50 



± 4 



— 



46 



2116 



50+72 = 122 



125 



± 8 



+ 



29 



841 



125-72= 53 



48 



+ 28 



— 



48 



2304 



48 + 72 = 120 



36 



± 



— 



60 



3600 



36 + 72 = 108 



82 



± 6 



— 



14 



196 



82 + 72 = 154 



76 



±190 



— 



20 



400 



76 + 72=148 



28 



± 48 



— 



68 



4624 



28 + 72=100 



60 



± 4 



— 



36 



1296 



60 + 72 = 132 



114 



± 22 



+ 



18 



324 



114-72= 42 



145 



±559 



+ 



49 



2401 



145 — 72= 73 



64 



±211 



— 



32 



1024 



64 + 72=136 



52 



± 4 



— 



44 



1936 



52 + 72 = 124 



67 



± 2 



— 



29 



841 



67 + 72 = 139 



67 



+ 299 



— 



29 



841 



67 + 72 = 139 



36 



± 1 



— 



60 



3600 



36 + 72 = 108 



96 



± 9 



± 











96 =96 



100 



+ 9 



+ 



4 



16 



100 — 72= 28 



105 



± 37 



+ 



9 



81 



105 — 72= 33 



51 



+ 156 



— 



45 



2025 



51 + 72=123 



67 



± 3 



— 



29 



841 



67 + 72 = 139 



98 



+ 163 



+ 



2 



4 



98 — 72= 26 



97 



± 9 



+ 



1 



1 



97-72= 25 



98 



± 8 



+ 



2 



4 



98-72= 26 



20^ 



± 49 



+ 106 



11204 



202-72 = 130 



22 



± 17 



— 



74 



5475 



22 + 72= 94 



34 



± 46 



— 



62 



3844 



34 + 72 = 106 



315 



±240 



+ 



219 



47950 



315 — 72 = 243 



312 



±131 



+ 216 



46660 



312 — 72 = 240 



83 



± 73 



— 



13 



169 



83 + 72=155 



141 



±147 



+ 



45 



2025 



141 + 72= 69 



—24 



±150 



— 



120 



14400 



-24 + 72= 48 



96 = Mean 1 74287 = :SA^ - 



The mean error of a single determination is therefore 



174287 



y -^ir^ = 'V/5126 = ±72 



and the mean error of the mean, 96, is 



■72 



- = 12. 

 V35 



