CONTENTS. xiii 



X. Analyfis of a Memoir of Citizen Bonhomme on the Nature and Treatment 

 of Rachitis or the Rickets — — — — p. 174 



Nature of Rachitis. Treatment with allcaline lotions — and phofphate of lime internally. Obfcrva- 

 tlons on urine and its dcpofitions — paiticularly of rachitic fubjefts. 



XI. On the Nature of the Diamond. By Smithfon Tennanr, Efq. F.R.S. p. 177 



Hiflorical remarks on the corabuftibihty of the diamond. Combuftion with nitre in a veflcl of gold. 

 ElUmates of the quantity ofiixed air or carbonic acid afToided by the diamond — It affords nothing 

 but the fluid called fixed air, 



XII. Ufeful Notices refpeding various Objefts — Improvement of Telefcopes 

 — Impel fedions of Optical Glafs — Purification of Mercury p. iSo 



Advantages of an iris, or changeable aperture to telefcopes — Mechanical contrivances for that pur- 

 pofe. Method of examining glafs by the microfcope. Experiments. Mercury purified by 

 agitation. 



XIII. A Memoir containing fome Refults arifing from the Adion of Cold on 

 the Volatile Oils, and an Examination of the Concretions found in feveral 

 of thofe Oils. By Citizen Margueron, Member of the Societe des Phar- 

 maciens at Paris — — ■ — — p. 1S2 



EfTcft of cold on the pure oils of peppermint, orange-flower, lemon-peel, bergamot, lavender, thyme, 

 turpentine, and cinnamon. Alfo on thofe oils mixed with water. 



Mathematical Correfpondence — — — p. i86 



Scientific News — — — — p. 188 



Letter from Sir Benjamin Thompfon, Count of Rumford, F. R. S. to the Ri^ht 

 Hon. Sir Joieph Banks, Bart. K. B. P. R. S. announcing a Donation to the 

 Royal Society for the Purpofe of inftituting a Prize Medal p. 188 



Biennial premium of Count Rumford for the bell improvement or difcoveries refpefting heat or light. 



New Publications — — — — p. i^o 



Table of fpecific gravities of water with common fait. 



AUGUST 



797. 



I. An Account of the New Syftem of Meafures eftablidied in France. By 

 Ch. Coquebert — — — — P- 19? 



Origin of the fyftem. Two univerfal meafures, length of the pendulum, and magnitude of the 

 <arth. Preference given by the French Republic to the latter. Data, as at prcfent known. 

 Quadrant of the meridian from the equator to the pole, taken as the fundamental unity. Decimal 



fuBdivlfion. Nomenclature. Lines. Surfaces. Solids. Weights monetary. Tables i. Of 



the nomenclature of the new meafures, and their relation to the old French and Englith. 2, Pro- 

 portions of the new and old French meafures. Annotation rcfpefting the limits of error. 



Vol. I. — March 1798. — Suppjl. b II. Analyfis 



