18 



PRODUCTS OF INDUSTRY, ARTS, AND 

 MANUFACTURES. 



59- Specimens of Printing in Oil Colours. — By G. Baxter, 

 London. 



60. Six Inch Speculum for Reflecting Telescope. — Cut and 

 ground by Joseph Redshaw, tailor, Gateshead. 



61. A Plate of Fine Silver. — Benjamin Johnson, Esq. 



62. Specimens of Colours produced by thin films of Oxide on 

 the surface of Metallic Lead. — Benjamin Johnson, Esq. 



63. Plate of Fine Silver. — Locke, Blackett and Co. 



64. Fire Bricks. — By T. Carr, Scotswood. — Showing the pre- 

 sent state of the manufacture. Also a specimen of raw clay 

 as brought out of the mine, same as the bricks are manufac- 

 tured from. 



65. Printed and Dyed Leather. — From Jon. Priestman, 

 Low Friar-street, Newcastle. 



66. Specimens of Paper Staining. — From Daniels and Co., 

 Newgate-street, Newcastle-upon-Tyne. 



67. Model of a Coal Waggon in Silver. — Messrs. Reid & Son. 



68. Specimen of Silk Waste (Strusa.) — James Holdforth, 

 Esq., Leeds. 



About thirty years ago this article was considered of no value 

 except for tillage for which it was used by the Italians. Various 

 experiments and attempts were at intervals made to apply machi- 

 nery to its manufacture, which of late have been so far perfected 

 that it can now be wrought into a beautifully fine thread as the 

 accompanying sample will shew, and has become an article of 

 considerable importance and value. 



69. Specimen of Silk Yarn. — James Holdforth, Esq., Leeds. 

 In one pound weight of this there are 150,000 yards, which 



is equal to 85^ miles in length. 



70. Specimens of Flaxes and Yarns, from Messrs. Hives and 

 Atkinson, Leeds. 



A. the coarsest line yarns we produce. B. a medium quality 

 and size. C. The finest ever produced, and we believe to be 



