The CONTENTS.

z. An Account of Amber; by OA. Phil. Jac.Hartman ibid.

LxV. An odd Sort of Amber; by OA. Heve-lius 490

;LXVI. White Amber ; byM. Kirkby 491LXVIs. The Eies tricat Potoer es Stones, inrehtion to a Vegetable Rostn ; by Dr. Li-ster ibid.

LXVIII. A Catalogue of Electrical Bodies;

by Dr. Rob. Ploc ibid.

LXIX. 1. Ambergreece, «Vegetable Pro-

duction; by . Communicated by

OAr. Boyle 492

2. An Animal Produktion ; by OAr. RobertTred-way ibid •

LXX. ,. The Produktion es Coral-, by S.Paulo Boccone ibid.

2. ByOA. Guisony 493

LXX1. 1. Trochita; and Entrochi defiribed ;ly Dr. Lister ibid.

2. By OAr. Ray 497

3. By OAr. J.Beaumont ibid.

LXXJI. 1. The Astroites ; ly Dr. Lister 503

2. ByOAr. Ray 505

LXXTII. Lapides Judaici ; by Dr. Lister ib.LXXIV. 1. Vertues of the Ostracites; by

, Dr, Cay ibid.

2 . By Dr. Lister 507

LXXV. 1. Several Regularly Figur’d Stones ;ly OAr. Edw. Lhwyd ibid.

2. By Dr, Sloan 5i1

LXXVI. l. The Giants-Causway in Ireland;by Sir Rieh. Buckley ibid.

2. By Dr. Sairi. Foley 512

3. By Dr. Tho. Molyneux 5x3

4. A Further Account»/ the Giants-Cauf-

way3 by Dr. Tho. Molyneux 514

LXXVII. The Gromhof Spar, and the Forma-tion of Rock-Plants; by OAr, J. Beau-mont $19

LXXVIII. A Rock of Natural Salt in Che-sture; by Mr. Adam Martindale 523LXXIX. 7 he Salt- Mines in Transylvania andHungary'; by Dr, Brown ibid.

LXXX. Sal-Gemme Mir.es in Poland ; by

.... 524

LXXXI. 1. The Natron of Egypt, and Ni-trian-Water Examin’d ; by Dr. CharlesLeigh 525

2- The Original of tbe Nitre of Egypt; byDr. Lister 529

LXXXII. The Pyrites and Lapis Calcarius,conßdered ; by Dr, Tankred Robinson ibid.LXXXlll. Tbe Spontaneous Firing of tbe Py-rites ; by Dr. Fred.Slare 5?o

LXXX1V. A Mineral at L\ege t yieJding Brim-stone and Vitriol; by Sir Rob. Moray ibU.

LXXXV. 1. Sulphur, Vitriol, Alium andMinium, from a Stone r» Sweden; by SirGilb. Talbot 531

2. The fame in England ; by ... . ibid.LXXXV1. Green-Copperas Works; by OAr.

Dan. Colwal ibid.

LXXXVII. Oyl of Vitriol Increaßng inWeight; ly Dr. William Gould 534LXXXVIII. White Vitriol-, by.Dr, Lister 537LXXXIX. Allom-Works; by OAr. Dan. Col-wall 538

XC. Experiments about Vitriol, Sulphur andAllom ; by . . - - 541

XCT. The Efflorefcence of certain MineralGlobes ; by Dr. Lister §48

XCII. 1. Amianthus; by ... . ibid .

2- By Mr. Edw. Lloyd 549

XCIII. i. Incombustible Cloth ; ly OAr.Nich. Waite ibid.

2. By . 550

2- By Dr. Robert Plot ibid.

XC1V. Lapis Calaminaris; by OAr. GilesPooley 5,4

XC V. I. To Vitrifie Antimony reitb Cawk 3by Dr. Lister 555

2. Tbe sirtueof Antimony3 by . . . . 556XCVI. A Black Shining Sand front Virginia,Examin'd \ by Dr. AU.Moulen ibid.

XCVI1. A Black Sand from Italy: by OAr.

Butterfield 557

XCV1II. To mähe Metal Run Smooth andClose ; by ... . at Franckfbrt on tbeMain ibid.

XCJX. 1. Iron-Works in Glocesterlhire;by OAr. Hen. Powle 558

2. In Lancashire ; by OA. John Sturdy $5 9

3. By Dr. Lister " 560

C. 7 he True Way of mahing Steel; by Dr.

Mark. Lister ibid.

CI. i. Copper-Mines in Hungary; by Dr.Edw. ßrown 562

2. In Lancaihire and Cumberland; by 0 >ir.

Dav„ Davies, to Dr. Lister ,63

3 . By . . . . te Dr. Lister ibid.

CII. To mähe Brass; by OAr. Tho. Povey 565CI11. >. The Tin Mines in Devon and Corn-

wall -,.by ... . ibid *

2. By Dr. Chr. Merret 572

CIV. 1. Lead-Mines in Somersetstiire -, byMr. Jos. Glanvil 573

2. Afurther Account ; by OAr. Jostdamil 5742. /»Germany-, ly ... . 576

CV. The Poysonous Quality of Lead-Ore; byOAi. J.Beaumont ibid.

CVI. Ihe IVayof OAtking Gerate ^ by Sir Phili-berto Veraatti ibid.

e CV11.