ollow perforated or slotted cast- fresh and clean. When the buoyant eggs of salt water fish forated cylinder, contained in an outer casing that is open are to be hatched, the current through the apparatus will at the bottom, and of anair-pump that is connected with ings hinged togetherand provided… … the device is first dipped in coal oil until the asbestos fiber at the bottom of the jars. By proper manipulation of the ratus is to be used, it is placed over the outlet of this burrow, and the soil packed around the lower end of the casing to becomes saturated. It is then ignited with a match,…
Internet Archive · Public domain (published before 1931). Free to use for anything.
![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-219-48.webp)
