314 New Scientific Books. [Oct 



In the night after, the temperature fell at Tottenham to 48-5 

 with dew. The lowest temperature was observed about seven 

 minutes after the greatest obscuration ; and by the rate at which 

 it should have advanced, instead of falhng, from one to two, 

 p. m. I think we may safely add 3° to the 7° which were 

 observed at Newington, and estimate the total abatement of heat 

 on this occasion at full 10° of Fahr. 



At the time of the greatest obscuration, the thermometer being 

 brought from under the tree, and exposed to the sun's rays, the 

 quicksilver rose only half a degree. Yet the little crescent formed, 

 by the rays collected in a lens of 2-i- inches focus, was still 

 capable of firing tinder, and burning out the black spots in blot- 

 ting paper. My son observed, that the spots of hght faUing 

 through the shade of trees on the ground, instead of being glo- 

 bular, as usual, were crescents. 



X. Surrei/ Institution. 



The following arrangements have been made for lectures at 

 this Institution during the ensuing season : 



1. On Metallurgy and Mineralogical Chemistry, by Frederick 

 Accum, Esq. M.R.I. A. To commence on Tuesday, Oct. 31, at 

 seven o'clock in the evening precisely, and to be continued on 

 each succeeding Tuesday. 



2. On Electricity, by Charles Woodward, Esq. To com- 

 mence on Friday, Nov. 3, and to be continued on each succeed- 

 ing Friday at the same hour. 



3. On Music, by W. Crotch, Mus. Doc. Professor of Music 

 in the University of Oxford, early in 1821. 



Article XI. 



NEW SCIENTIFIC BOOKS 



PREPARING FOR PUBLICATION. 



Mr. Swaiiison is about to publish the first number of his Zoological Illus- 

 trations. 



Dr. Sir A. B. Faulkner has in the press a Treatise on the Plague, with Ob- 

 servations on its Prevention, Character, and Treatment. 



Mr. E. Morgan, surgeon, will soon publish. Practical Observations on the 

 Nature and Cure of Dropsies and Diseases of the Skin, illustrated by several 

 cases. 



Sir R. K. Porter has in the press, Travels in Georgia, Persia, Armenia, &c. 

 in 1817,1818, I8I9, 1820, with engravings of antiquities. 



Mr. Edward Grainger, jun. is preparing a Concise System of Anatomy, for 

 the Use of Medical Students. 



Outlines of Midwifery : developing its Principles and Practice, with illustra- 

 tive lithographic engravings, in 1vol. 12mo. principally designed for Students ; 

 by J. T. Conquest, M.D. F.L.S. will appear early in the present month. 



