CONTENTS. Vll 



Page 



An Observation of Saturn, made at Paris ; by M. Huygens and M. Picard 326 



Biographical Notices of M. Huygens, M. Picard, and M. Slusius 326-7 



Account of Renati Fr, Slusii Mesolabum, and of Lower's Tractatus de Corde ibid 



Additioiiiil Observations on Vegetables; by Dr. Tonge 332 



Connection of Parts of a Tree, with those of the Fruit; by Dr. Beale 334 



The Laws of Motion on the Collision of Bodies; by M. Huygens 335 



On the Resolution of Equations in Numbers ; by Mr. Collins 338 



Supplement to the Biographical Notice of Mr. Collins, at p. 207 ibid 



Account of Praeludia Botanica Roberti Morison 341 



Biographical Notice of Robert Morison ibid 



Account of CI. Salmasii Praefatio in Librum de Homonymis Hyles latricae 343 



Biographical Notice of Salmasius ibid 



On the Use of Pendulum Watches for finding the Longitude; by M. Huygens ibid 



Account of two Parhelia seen in Hungary ; by Dr. Ed. Brown 349 



Conferences at Paris for Improving Painting and Sculpture ibid 



Account of Books; viz. 1. Beverege's Institutionum Chronologicarum Libri duo; 2. Holder's 



Elements of Speech; 3. Anderson's Gauging promoted ; 351 



Use of an Hyperbolical Cylindroid, for Grinding Glasses; by Dr. C. Wren 353 



Exi^riments on the Motion of Sap; by Mr. Willoughby and Mr. Ray 354 



Biographical Notice of Francis Willoughby, Esq ibid 



Concerning Damps in the jMines of Hungary 356* 



A Chronological Account of the Eruptions of Mount ^tna 357 



-Account of a woman having a Double Matrix 358 



Account of Books ; viz. 1. T. Hobbes Quadratura Circuli, &c. confutata, Auth. J. Wallis; 

 2. Historia Genral de Ethiopia a Alta; 3. Webb's Essay on the Language of China; 4. On 



the Way of Teaching the Latin Tongue 359 



Observations concerning the Bath Springs; by Mr. Joseph Glanvill 36 1 



On the Icy and Crystalline Mountains of Helvetia ; by Mr. Muralt 365 



Some Observations concerning Japan ibid 



Of M. de Villette's Metalline Burning Concave 367 



Account of Books; viz. 1. MalpighiiDissertatio Epistolica deBombyce; 2. Description Anato- 

 mique d'un Cameleon, &c. ; 3. Labyrinthus Algebrae, Auth. J. G. Ferguson; 4. Wittie's 



Answer to Sympson's Hydrologia Chymica ibid 



The Weight of Water in Water ^Jvith Common Balances; by Mr. Boyle 374 



Observations on Two Voyages to ^le East Indies; by Mr. Rd, Smithson 375 



On the Varieties and Comparative EXj^ences of Slate; by Mr. Sam. Colepress 3/6 



On some Shell Snails, and tlie darting of Spiders 377 



Account of Books ; viz. 1. Geo. Sinclari Ars Nova et Magna &c. ; 2. Leyser, Observationes 

 Medicae; 3. O. Tachenii Hippocrates Chymicus; 4, Bartholin de Cygni Anatome; 5. Straachii 



Brev. Chronol. ; 6. Labbe Abr>'ge Chronol 380 



Biographical Notice of George Sinclair ibid 



Making of Sea Salt in France by the Sun 382 



On the Eruptions of Mount ^tna 383 



On M. Steno's Discours sur I'Anatomie du Cerveau 387 



On divers Minerals emitted by Mount iEtna 389 



On the Organs of Generation; by Dr. King and Dr. de GraafF ; 390 



Uncommon Swelling of a Woman's Breasts; by Dr. Wm. Durston 393 



Account of Books ; viz. l.Dary's Gauging; 2. Charas Histoire Naturelle des Animaux, &c. . . 395 



Biographical Notice of Moses Charas ibid 



Dr. Chr. Wren's Engine for Grinding Optic Glasses 396 



On the Salt Springs and Salt-making at Nantwich; by Dr. Wm. Jackson 397 



On the Death of the Large-breasted Woman; by Dr. Wm. Durston 402 



Account of Books ; viz. 1. Boyle's Philos. Essays; 2. Mutoli, del Movimento della Coraeta; 3. 



Bartholin de Cometis; 4. Evelyn's Sylva et Pomona ibid 



Biographical Notice of Erasmus Bartholin 403 



Transactions at Paris relating to the Transfusion of Blood 404 



Another Letter on the Large- breasted Woman; from Dr. Durston 405 



