CONTENTS. 



XMl. C/7 the Lie of Steamed Potatoes as a Substitute for 

 Hay to Cattle 116 



X\'I1I. A demovstrahle, accurate, and at all Times prac- 

 ikcilh ISlethod of adjusting Hadley's Sextant so as to 

 render the Ba.'k Observation equally correct icith the Fore 

 Obsen-niion ; and to measure an Angle of \ jo, 1 60, or 

 1 70 Degrees, as accurately as one of 30, 40, or 50 De- 

 grees. Covimunicaled to the Aitronomer Royal by Letter 

 ^aird Sept. £3, 1803. By the i?cy. Michael Ward, 

 of Tarnicorth, Staffordshire 123 



XIX. On the Utility of the Oxygenated Miuiatic Acid in 

 the Cure of Scarlet Fever ; ivith an easy Mode of pre- 

 paring it for Mediccd Purposes. By Mr. John Ayrey 

 Br»A'rH'.7AiTE, Member of the Royal College of Sur- 

 gt'ons in London, and Surgeon to the Lancaster Di- 

 spen-.ary 127 



XX. Report of Galvanic Experiments made on Men and 

 yhiimcls. Read to the Class of the Exact Sciences of 

 the Academtf of Turin bij C. Rossi 131 



X .KI. A Repo'rt ff the State of His Majesty's Flock of Fine- 

 woolled Spanish Sheep during the Years 1800 and IBOl ; 

 ivifh some Account of the Progress that has been made 

 towards the Introduction of that valuable Breed into those 

 Parts of the United Kingdom ivhere fine Clothing IVbols 

 are grown u ith Advantage ]40 



XXII. Medico-chemical Researches on the Virtues and, 

 Principles of Canfharides : extracted from a Memoir of 



C. Eeaupoil /// C. Deyeux 143 



XXI [I. Ohservutians o?i the Prussia Acid, and the Pro- 

 duction of a Pyrophorus by the Prussiate of Iron. By 



D. H. Grixdel 151 



XXn\ Experiments on the Oil produced f-om. the Leaves 



of the Laurel Cherry. By C. Roloff of Magdeburg 153 

 XX\''. On the Ether suggested, by Sir Isaac Newton, 



compared with the s^upposed newly discovered Principle of 



Gah'anis7)i. By Governor Pownall 153 



XXN'^I. On the Preparation, Culture, and Use of the Orchis 



Root. By .1. Percival, M. D 138 



XXVIL On the Plants employed by the antient People of 



Europe fur poisoning their Arroivs. By C. Coquebert 



163 



XXVIII. Experiment shoiving the Advantage of Periscopic 

 Spectacles. % AV. H. Wollaston, ilKD.F.iJ.S. l63 



XXIX. Process for extracting the Salt, with a Base of 

 T.itne, contaiiwd in Yellotv Cinchona. Commnnicated to 

 M. FouRCuov by C. Deschamps,. of Lyons 167 



XXX. 0« 



