ENGRAVINGS. 



Vol. III. Is illuftrated vtitl)«»i I^J^fkving of Mr. Klingert's new 

 Diving Machine, by which a %Mi|p^ may defcend a confiderable 

 Depth in Water, and move, vvallV^nd^'ork as if on dry Land ; the 

 Apparatus employed by Meffrs. Pcpysand Allen in Freezing Fifty- 

 fix Pounds of Mercury by Artificial Cold 5 and for Freezing Acids, 

 &c. The Apparatus propofed to be added to Mr. Kllngert'e Diving 

 Machine, to reader it more cxtenfively tife/ul— Captain Bolton'a 

 Machine for drawing Bolte in and out of Ships — Cit. Guyton'6 

 Eudiometer ; the improved Machine for Cutting Chaff, invented 

 by Mr. Robert Salmon, of Woburn, Bedfordihire, for which a 

 Bounty was voted to him by the Society for the Encouragement 

 of Arts. 8tc. — The ticw Machine invented and employed by the 

 Ikte Mr. Ciiftance to make his iinnvalled A^egetable Cuttings for 

 the Microfcope ; drawn and engraved from" the Machine itfelf, now 

 in the poffcffion of Dr. Thornton ; a Plate to explain the Method 

 of forming Figures with Sand on Vibrating Surfaces, according 

 to Dr. Chladni*8 Theory — The Furnace employed by the French 

 Chemiils in their Examination of C. Clouet's' Procefs for the im- 

 mediate Converfion of Iron into Call Steel by means of Carbonat 

 of Lime ; and the New Steel- Yard invented by C. Paul of Geneva. 



Vol. IV. is illuftrated with a Plate of Figures to explain Volta's 

 Theory of Galvanifm— Apparatus employed by Dr. Van Marura 

 for the Combuftion of Phofphorus in Oxygen Gas — A 4to Plate 

 relative to the StruAure of the Cryftals of Oxyde of Tin — A Plate 

 iUuftrating the bed ,Conftru£tion of the Vanes of Windmills, Jh far 

 as concerns the Angle of Weather — Mr. Mufliet'^ Pyrometer for 

 afcertaining the Heat of an Affay-furhace- — Von Hauch's New Dif- 

 charging Eleftrometcr, laid before the Royal Society of Cogen- 

 hagen—^Humboldt's Portable Barometer for Travellers — A Plate of 

 the comparative Height of the Mountains of Venus, the Earth, 

 and the Moon ; according to the Obfervations of M. Schroetb* 

 cf Lilienthal — C. Regnier's New Powder-proof for afcertaining 

 the comparative Strength of Gunpowder-+-And a mlciofcopic re- 

 prefentation of certain Animalculae found ou the Surface of a f ifll- 

 pond in Norway, which gave ic a Red Appearance. 



Vol. V. ifi illuftrated with a Reprefentation of a Elaft-Fumace 

 for the Redudion of |ron from the Ore in the large way of Ma- 

 nufafturc; from a Drawing by Mr. Mushet — the Apparatus em- 

 ployed by the French Chemiils in their Experimenis on the De- 

 flagration of the Diamond ; and alfo that ufed in the Produftioa 

 of Ccift Steel from Ir«n by Means of the Diamond — a Q^uarto Plate 

 of a New Mercurial Gazometer, invented by Mr. W. H, Pepys 

 Jan. — Mr. HTowabd's Improved Air-Furnane — a C^iarto and an 

 06tavo Plate, containing R eprefentations of Mr. BtJRN.Vs new In- 

 vention, whereby Apartments may be more efFe(?kually heated than 

 by the Methods now in life ; and the Accidents which fo fre- 

 quently occur, of Women's and Children's Clothes being fet on 

 Fire by Sparks from {be Grate, may be prevented — A Chsrt to 

 niurtrate Mr. Kvgent's aevy Magnetic, Theory— Mr. Souths 

 Ventilator for prefcrving Com on Slnp-board — Mr, Davjj's ir*>ru. 

 able Macbine for ioadir^ and unloading Goods. 



