nd valve box. The tubes being arranged at the lower sary to multiply the elements and to substitute for with a tube terminating in a gas orifice in the center part of the boiler, nearest the firebox, thus always them straight bars grouped quincunxially and mount- of the base. This orifice is of… … tem combined by Mr. Serpollet permits of FRIEDBURG’S BUNSEN BURNER. hauling, with a mechanical part whose weight scarcely exceeds a tenth of the total lar or slot-like form, one easy to clean and which has weight. proved adapted to secure the mixture of air and gas. The steam generator and the…
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![An illustration from Essai de physique, par Mr. Pierre van Musschenbroek ... avec une description de nouvelles sortes de machines pneumatiques, et un recueil d'expériences par Mr. J. v[an] M[usschenbroek] Traduit du hollandois par Mr. Pierre Massuet .. (1751)](https://img.insideoutlibrary.com/img/200/ia-essaidephysiquep02muss-436-69.webp)
