TABLE OF CONTENTS 



TO THE THIRTY-FOUR! H VOLUME. 



JANUARY, 1813. 



Engravings of the following subjects : A Periscopic Camera Obscura, by Dr. 

 Wollaston, Sec. R. S. A Periscopic Microscope, by the 'same. An 

 improved Pump for raising water, and keeping itself clear in mines or 

 wells, during the time of sinking, bv Mr. William Brunton. 



I. — Comparative Analysis of the Urine of different Animals. By M. 

 Vauquelin. - - - 1 



II. — Some Account of Zerah Colburn. an American Child, who possesses 

 some very remarkable Powers of solving Questions in . Arithmetic by 

 Computation, without Writing, or any visible Contrivance. - 5 



III. — Far her Experiments and Observations on the Action of Poisons on 

 the Animal System. By B. C. Brodie, Esq. F. R. S. Communicated to 

 the Society for the improvement of Animal Chemistry, and by them to 

 the Royal Society. (Concluded from p. 268.) ~ - 9 



IV. — On the Vegetation of high Mountains, translated from a Paper of Mr. 

 Ramond's in the Annales du Museum, V. iv. p. 395. By Richard Antony 

 Salisbury, Esq. F. R. S. &c. 16 



V. — Description of a Bank for Alpine Plants, by Monsieur Thouin, abridged 

 from his Paper in the Annales du Museum, V. vi. p. 183. By Richard 

 Anthony Salisbury, Esq. F. R. S. &c. - - 24 



VI. — On a Periscopic Camera Obscura and Microscope. By William 

 Hyde Wollaston, M D. Sec. R. S. From the Philosophical Transactions 

 for lbl2.p. 370. ... . - - 26 



VII. — Practical Experiments on hardening Steel. By Mr. E. Lydiatt, 

 Lecturer on metallurgy, and the mechanic Arts, &c. In a letter from 

 the Author. - ... - -. 31 



VIII. — Chemical Observations on the Sepia of the Cuttle Fish. By Mr. 

 GroverKemp. Received from the Author. 34 



IX. — On the Motions of the Tendrils of Plants. By Thomas Andrew 

 Knight, Esq F. R. S. From the Philosophical Transactions for 1812. 37 



X. — Additional Experiments on the Muriatic and Oxymuriatic Acids. By 

 William Henry, M. D. F. R. S. V. P. of the Literary and Philosophical 

 Society, and Phys : cian to the Infirmary at Manchester. From the Phil. 

 Transactions, 1812. ... 42 



XL — Experiments on Putrefaction. By John Manners, M. D. of Phila- 

 delphia. In a letter from the Author. - - 49 



XII. — Of the excellent Qualities of Coffee, and the art of making it in the 

 highest perfection. By Benjamin, Count of Rumford, F. R. S. Abridg- 

 ed from his 18th Essay, published in London in 1812. - - - 56 



XIII.— Meteorological Journal. - - - - 62 



XIV. — Description of an improved Pump for raising the water from Wells 

 or Mines, while sinking or making. By Mr. William Brunton, of 

 Butterly Iron Works, in Derbyshire. Extracted from the Transactions of 

 the Society of Arts, published in the Year 1812. - - 64 



XV. — An Account of an Experiment made in the College Laboratory, 

 Edinburgh, drawn up by John Davy, Esq. 68 



Scientific News. ------ 72 



FEBRUARY, 



