or. 53.  —... Maren 1819. No. 241. . 
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ipisac ony 3 Improvement 6n the Gas Blow-pipe. Nit 
BY ALEXANDER SA SG OG BE i255 hy 
M.RL.A, M.G.S,.M.R.A.S. MUNICH, 7.9.A. EDIN. AND PERTH, &c.: ‘SenIt} 
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' PRINTED BY RICMARD AND ARTHUR TAYLOR, SHOE-LANE: | 
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pig, and Co. Edinburgh: Brasx and Rein; Duncans and Psx- SS 
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