448 



HENRY A. ROWLAND 



TABLE XXXVIII SECOND SERIES. Preliminary. 



March 7, 1878. Jacket 18.5 to 22. 5. Air about 21 C. 



TABLE XXXIX THIRD SERIES. Preliminary. 

 March 12, 1878. Jacket 13-2 to 16-6. Air about 15 C. 



45 In the calculation of this column, more exact data were used than given in the 

 other two columns, seeing that the original calculation was made every 5 mm. of the 

 thermometer. Hence the last figure may not always agree with the rest of the data. 



46 As this table was originally calculated for every 5 mm. on the thermometer, I 

 have given the weights which were used to check the more exact calculation. 



