432 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



of the wood, and not only by its presence protects it as a non- 

 conductor of heat, but deoxidizes all matters which are likely 

 to prove objectionable as ferments. 1 A, XXXL, 75. 



NEW PEOCESS FOE IXJECTING TIMBER. 



In this process, the invention of Mr. G. B. Smith, any anti- 

 septic compound that may be preferred is applied in solution 

 directly to the end of the green log, and by the application 

 of hydraulic pressure is forced to enter by the natural sap 

 channels of the wood, by which operation the sap is forced 

 out at the other end. The necessary pressure is maintained 

 by the use of an ordinary hydraulic pump until all the sap is 

 expelled, and the preserving solution appears in full strength 

 at the farther end, when the thorough saturation of the log 

 is most effectually assured. The mechanical appliances are 

 simple, consisting merely of a cast-iron cap, litted tightly 

 against a metal ring driven into one end of the log, by means 

 of a chain, or rod, and clamp passing over the other end, and 

 communicating directly with the pump. 



IRON AND STEEL FOR BOILERS, BRIDGES, ETC. 



At a meeting of the Franklin Institute, committees were 

 appointed to investigate the subject of the strength of iron 

 and steel, with directions to make such experimental trials 

 as may be necessary to include materials such as are at pres- 

 ent found in the market, and employed for the construction 

 of boilers, bridges, and other structures of iron and steel. 

 In pursuance of this resolution, the sum of $1000 was appro- 

 priated for the purpose of defraying the cost of the purchase 

 and preparation of samples of iron and steel for the testing- 

 machine. 7 D, September, 1875. 



CAST STEEL FOR LOCOMOTIVE BOILERS. 



According to the Society of German Railroad Engineers, 

 the use of cast steel for locomotive boilers has not been so 

 satisfactory as was expected. 18 A, XXL, 89. 



BESSEMER PROCESS WITH HOT BLAST. 



Heyrowsky states that during the summer of 1874, at the 

 Bessemer works in Zeltweg, fifty to sixty charges were made 

 simply with a hot blast of about 1200 with cast iron, the an- 



