A guide to the scientific knowledge of things familiar / by the Rev. Dr. Brewer.
- E. Cobham Brewer
- Date:
- [1853]
Licence: Public Domain Mark
Credit: A guide to the scientific knowledge of things familiar / by the Rev. Dr. Brewer. Source: Wellcome Collection.
45/496 page 33
![Q. Was there heat in the cold water and lime, be/ore they were mixed together? A. Yes. All bodies contain heat; the coldest ice, as well as the hottest fire. Q. 7s there heat eveti in tce ? A. Yes'; but it is latent (i. e. not perceptible to our senses). Latent, from the Latin word, Lafeo, (to lie hid). Q. How do you know ihere is heat, if you cannot perceive it ? A. Thus:—Ice is 32°* of temperature, by the thermometer; but if a pound of ice be melted over a fire, (although 140 of heat are absorbed by the process), it will feel no hotter than it did before. i. e. it will be only 32°, and not 172o by the thermomete-p. Q. What becomes of the 140° of heat which went into the ice to melt it ? A. They are hidden in the water; or stored up in a latent state. Q. How much heat m,ay he thus secreted or made latent ? A. The quantity varies in difi'erent substances; but in ivater, as much as ] 140° of heat may remain latent. * 32, i, e. 32 degrees ; 140'', i. e. 140 degrees, &c.](https://iiif.wellcomecollection.org/image/b21495464_0045.jp2/full/800%2C/0/default.jpg)
