Manchester Memoirs, Vol. lix. (191 5), No. \%. 



are shown. On one there is a scale against which Dalton 

 has written : — " Reformed graduations as the square of 

 the temperature," and against the other, " Graduations 

 of water therm, to correspond with common scale of 

 mercurial thermometer." These show graduations from 

 42 to 212 . On the middle of the sheet these scales are 

 again drawn on a larger scale, with only seven graduations. 

 On the right is hand-printed : — 



Water Therm. 

 Lowest Point. 



In Earth Ware ... 



38 



Stone-W. 



... ... 



40 



Glass ... 



... 



41J 



Iron ... 



... 



42J 



Copper 



... 



45i 



Brass... 



... 



4 6 



Pewter 



... 



46 



Lead . . . 





49i 



Zinc ... 



... 



... (no number) 



These numbers correspond nearly 



with those on p. 31 



of Part I. of the "New 



System." 





On the bottom of the diagram the following numbers 

 are tabulated : — 



6° 16 26 38 48 56 66° 76 86< 



9 



7 



5 



3 



1 



1 



3 



5 



7 



9 



2 



2 



2 



2 



2 



2 



2 



2 



2 



2 



1 1 



9 



7 



5 





1 



1 



3 



5 



7 



real ex p. 

 glass, etc. 



appar. exp. 



which further illustrate Dalton's experiments on the maxi- 

 mum density of water. He concluded that this greatest 

 density is at or near 36 of the old scale, and $J° or 38 

 of the new scale. 



