Information they cannot possibly obtain from any other source; cm also be adjusted vertically, a slot being left for subjects in which planters and farmers are interested will be found dis- Improved Steam Trap. that purpose in the upright, H ; thus affording an cussed In the SCIENTIFIC AMERICAN… … To mail subscribers :—Three Dollars a Tear, or One Dollar for four RAY'S IMPROVED STEAM TRAP. months. One Dollar and Fifty Cents pay fur one complete volume of 416 pages; two volumes comprise one year. A new volume com- to cold air, or temperatures less than that of the plug. This invention was…
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