Scientific American. 427 May 27, 1905. … a number of thermo-elements may alternate- sequent saving of coal. Another considera- Fig. 4. -APPAEATUS FOE EECOEDING THE TEMPEEATUEE OF THE ly be placed in circuit with the registering tion, particularly in iron and steel works, PEODUCTS OF COMBUSTION OF FIVE BLAST FUENACES. instrument. This…
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