170 



Thermometer, Confectioner's. For chocolate-melting: Range, 

 60 120 F. For sweets-making : Range, 2oo-4Oo F. 

 For vacuum pans : Range, ioo-35o F. [5, 6, 13, 16, 17, 

 20, 21.] 



Thermometer, Copper Case. Any form of thermometer fitted in 

 a copper case, usually applied to the thermometers used in 

 brewing. [13, 15, 16, 17, 20, 21, 27, 28.} 



Thermometer, Deep Sea. A thermometer for ascertaining the 

 temperature of the sea at any depth. The instrument is 

 automatically reversed at any given depth and the temper- 

 ature recorded by the mercury column broken at the 

 moment of reversal. [6, 13, 15, 17, 20, 21.} 



Thermometer, Dial. A thermometer with a scale in the form 

 of a circular dial. The tube may be made of glass or metal. 



Thermometer, Differential. An instrument, invented by Sir J. 

 Leslie, having two air bulbs connected by a bent stem con- 

 taining coloured sulphuric acid. It usually indicates, without 

 measuring, differences of temperature of the two bulbs. 

 [13, 15, 16, 17, 20, 21, 25} 



Thermometer, Distance. A thermometer used for indicating or 

 recording temperatures at a distance, usually electrically 

 operated. See Pyrometer. 



Thermometer, Economises Range, 5o-40o F. [5, 6, 13, 16, 

 21.} 



Thermometer, Electrical Distance. See Distance Thermometer. 

 [4. 6, 13, 16} 



Thermometer, Peed Water. Range, 4o-24o F. [5, 13, 15, 16, 

 20, 21, 28} 



Thermometer, Flour Hopper. Range, 3o-ioo F. [5, 6, 13, 15, 

 17, 21} 



Thermometer, Gasworks. Two standard types. Ranges, 30- 

 160 F. and 7O-24O F. [4, 5, 13, 15, 16, 17, 21} 



Thermometer, Gum Melting. Range, 2oo-75o F. [5, 15, 21} 



Thermometer, Hand-Testing. Range, o-i2o F. [5, 6, 13, 15, 

 16, 17, 21} 



Thermometer, Immisch's. A form of special pocket thermometer. 

 It contains a crescent-shaped, thin, metallic vessel filled 

 with a highly-expansible liquid. [20, 21, 26} 



Thermometer, Incubator. A special form of thermometer for 

 use in incubators. [2, 5, 15, 17, 21, 26} 



Thermometer, Index. See Dial Thermometer. [4, 16, 21, 25} 



Thermometer, Jam Boiling. Ranges, 2oo-240 F. and 180- 

 270 F. [5, 6, 13, 15, 16, 17, 21, 26} 



Thermometer, Linseed Oil. Range, 6o-i5o F. [5, 13, 15, 16, 

 21} 



Thermometer, Loaf-Testing. Ranges up to 400 F. [1, 5, 13, 

 15, 16, 17, 21} 



Thermometer, Maximum. A thermometer provided with an 

 index showing the maximum temperature reached during 

 a given period. The index may form part of the mercury 



