roh. XVII.] 



Aloes 



Succinum pelluci- 

 duin 



Sucdnum pingue 



Jet 



The top part of a 

 rhinoceros-horn 



Top part of an ox- 

 horn 



Blade-boneof an ox 



Human calculus . . 



Anothercalculus. . 



Another 



Common brimstone 



Borax 



Aspotted factitious 

 marble 



A gallipot 



Oyster-shell 



Murex-shell .... 



Lapis manati .... 



Selenitis 



Wood petrified in 

 Lough-Neagh. . 



Onyx-stone ... 



Turcois-stone. . . 



English agat . . . 



Grammstius lapis 



A cornelian 



PHILOSOPHICAL TRANSACTIONS. 



S23 



1177 Corallachates . . . . 2605 



Talc 2657 



1065 Coral 2689 



1087 Hyacinth(spurious) 2631 

 1238 Jasper (spurious) 2666 



A pellucid pebble 2641 

 1242 Rock crystal 2659 



Crystallum disdia- 



1 840 clasticum 2704 



1656 A red paste 2842 



1240 Lapis nephriticus 2894 

 1433 Lapis amianthus 

 1664 from Wales .. . 29 13 



1811 Lapis lazuli 3054 



1720 A hone 3288 



Sardachates 3598 



1822 A granite 3978 



1928 A golden marcasite 4589 

 2092 A blue slate with 

 2590 shining particles 3300 

 2270 A mineral stone, 

 2322 yelding I part 



in 160 metal . . 2650 

 2341 The metal thence 



2510 extracted 8500 



2508 The(reputed)silver 

 25 12 ore of Wales . . 7464 

 2515 The metal thence 

 2568 extracted 1 IO87 



Bismuth 9859 



Spelter 7065 



Spelter solder ... 8362 

 Iron of a key .... 7643 



Steel 7852 



Cast brass 8 100 



Wrought brass . . 8280 

 Hammered brass. . 8349 

 A false guinea . . . 9075 

 A true guinea. . . . 18988 

 Sterling silver. . . . 10535 

 A brass half-crown 9468 

 Electrum, a British 



coin ] 207 1 



A gold coin of Bar- 



bary 17548 



A gold medal from 



Morocco 18420 



A Mentz gold du- 

 cat I8261 



A gold coin of 



Alexander's ... 1 8893 

 A gold medal of 



Queen Mary . . 19 100 

 A gold medal of 



Q. Elizabeth . . 19125 

 A medal esteemed 



nearly fine gold I9636 



On the Jron-lVorhs in Lancashire, by Mr. John Sturdy. Communicated by 

 Dr. Martin Lister, S. R. S. N° 199, p. 695. 



At Milthorp-forge, in Lancashire, they have several sorts of iron-stone, and 

 of different natures ; for some make cold-short iron, such as is brittle, when it 

 is cold; another sort makes red-short, such as is apt to break if it be hammered, 

 when it is of a dark red heat, and therefore is never melted down but in mix- 

 ture, and so it yields an indifferent good sort of iron. Of late they have made 

 it mudi better, by melting the sow-metal over again, and by using turf aud 



3x2 



