Handbook for heating and ventilating engineers . = Fahrenheit degrees and C = Centigrade these equations it may be seen that the two scales co-incide at but one point,—40 degrees. For conversion of thequantity units tlie fullowing may be used: 1 British thermal unit = Calorie. 1 Calorie = British thermal units. These are for the ajbsolute conversion ot a certain quantityof heat from one system to the other. If, however, theeffect of this heat is considered upon a glveriHvoight of sub- MEASUREMENT OF TEMPERATURE 11 Stai^ce and the weight also is expressed in the respect
Handbook for heating and ventilating engineers . = Fahrenheit degrees and C = Centigrade these equations it may be seen that the two scales co-incide at but one point,—40 degrees. For conversion of thequantity units tlie fullowing may be used: 1 British thermal unit = Calorie. 1 Calorie = British thermal units. These are for the ajbsolute conversion ot a certain quantityof heat from one system to the other. If, however, theeffect of this heat is considered upon a glveriHvoight of sub- MEASUREMENT OF TEMPERATURE 11 Stai^ce and the weight also is expressed in the respectivesystems, the following values hold: 1 Calorie per kilogram = British thermal units per British thermal unit per pound = Calorie per conversion tables from kilograms to pounds and viceversa, see Suplees Mechanical Engineering Reference Book,page 72, or Kents Mechanical^ Engineers Pocket-Book,page 22. 3. 3Ieasureinent of High Temperatures:—For the meas-urement of temperatures up to the boiling point of mer-handbookforheati02hoff. 14
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