1830.] 
Notices of Boohs . 
259 
ture observed was 97° Fahrenheit. Dr. Heberden remarks, that the extraordinary 
weather of this month passed away without rain, lightning, change of wind, or any 
other obvious cause (?) and cites the nearly parallel case of the year 1808, as re- 
corded in the Society’s observations, and also by Mr. Cavendish. He gives some 
Observations and experiments on a method of ascertaining the sensible heat , which 
he believes to be much above that indicated by the thermometer, by means of 
previously raising the thermometer to a high temperature, and then noting its suc- 
cessive decrements in equal times or exposing it to the open air. In the conclud- 
ing remarks on sensible cold, Dr. H. states his opinion that its chief cause is the 
loss of heat by the body, effected by the action of the wind, not by the moisture 
of the surrounding atmosphere.” 
If this be the matter to which your correspondent refers, it appears that he made 
a mistake in supposing the paper had been read before one of the medical so- 
cieties— I am, Mr. Editor, your’s, &c. C. 
4. Boring for Springs of Fresh Water in Egypt . 
In a notice given in the Calcutta Literary Gazette , extracted from the Athenae- 
um of May 1st, occurs the following very interesting intelligence. 
“ The miners which a most liberal British spirit brought hither, to bore for 
. water, have had an encouraging success in the neighbourhood of this city; but 
the main object will be the desert tract between Cairo and Suez, where there is 
not now a drop of water to be met with.” 
XI . — Notices of Books. 
Library of Useful Knowledge . London: Baldwin and Craddock. 1829. 
In our fifth number (Vol. I. p. 142,) we gave a brief notice of this work, includ- 
ing the titles of the first 28 numbers. Since that time 33 additional numbers 
have reached this country, the titles of which we here subjoin, for the information 
of our readers. 
29. 
Navigation, 
30. 
History ©f Greece, 
Part II. 
31. 
Life of William Caxton, 
32. 
History of Greece, 
Thermometer and Pyrometer, 
Part III. 
33. 
Part 11. 
34. 
History of Greece, 
Part IV. 
35. 
Geometry, 
Part I. 
36. 
History of Greece, 
Part V. 
37. 
Geometry, 
Part II. 
38. 
History of Greece, 
Life of Sir Edward Coke, 
Part VI. 
39. 
40. 
History of Greece, 
Part VII. 
41. 
Galvanism, 
42. 
Geometry, 
Part HI. 
43. 
History of Greece, • 
Part VIII. 
44. 
Animal Mechanics, 
Part II. 
45. 
Life of Mahomet, 
46. 
Double Refraction and Polarization of Light, 
Part I. 
47. 
Physical Geography, 
Part II. 
48. 
Life of Niebuhr, 
49. 
History of Greece, 
Part IX. 
50. 
Life of Sir Isaac Newton, 
51. 
Geometry, 
Part IV. 
52. 
Life of Admiral Blake, 
53. 
Double Refraction and Polarization of Light, 
Part II. 
54. 
Glossary and Index, with title page, to the volume of 
Natural Philosophy. 
55. 
Arithmetic and Algebra, 
Part III. 
56. 
Chemistry, 
Part I. 
57 • 
Art of Brewing, 
Part I. 
58. 
An Account of Newton’s Optics, 
Part I. 
59. 
Animal Physiology, 
60. 
Art of Brewing, 
Part II, 
61. 
Geometry, 
Part V. 
