. La American entomologo. Entomologia. La American entomologo. der con l'aria-camera ; Fig. 95 rappresenta il filtro ; Fig. 94 l'ugello, mostrando l'organizza- zione per la pulizia della stessa ; e la Fig. 96 mostra una modifica della scarica-tubo. " La lettera a rappresenta il serbatoio per il contenimento di poi- liquido sonous ; 6 è la pompa-cilindro in cui il pistone c è lavorato in su e in giù mediante la leva tf. L'estremità inferiore di questo cilindro è realizzato a forma di imbuto, e ad esso è fissato il tubo di gomma e che la collega con il filtro a reticella/". Questo filtro è realizzato in due par

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. The American entomologist. Entomology. THE AMERICAN ENTOMOLOGIST. der with the air-chamber ; Fig. 95 represents the strainer ; Fig. 94 the nozzle, showing the arrange- ment for cleaning the same ; and Fig. 96 shows a modification of the discharge-pipe. " The letter a represents the reservoir for holding the poi- sonous liquid ; 6 is the pump-cylinder in which the piston c is worked up and down by means of the lever tf. The lower end of this cylinder is made funnel-shaped, and to it is fastened the rubber tube e which connects it with the strainer/". This strainer is made in two parts for the introduction of a strain- ing-cloth, ^, and for convenience in cleaning. The lower end of the strainer is perforated, and, if desired, any additional straining matter may be placed between the perforated bottom and the cloth, so as to make sure that no substances shall be forced into the sprinkler to clog its action. To the lower end of the cylinder is secured the discharge-pipe A, upon the top of which is formed the air-chamber /. Upon the outer end of the discharge-pipe is placed the sprinkler /, which is round and flat, as shown, and perforated about one-half round. Upon the top of this sprinkler is screwed the cap or cover m, secured to which is the brush k. The handle of the brush is bent at right angles, as shown, and is secured to the cap in such a manner as to form, as it were, a part thereof, so that as the brush is moved around to clear away any obstructions which may have a tendency to close up tfie fine perforations in the edge of the sprinkler, the cap turns with it. By means of this screw-cap the brush can be adjusted up and down at will, so that after cleaning off the perforations the brush can be depressed down below the level of the holes, so as to be out of the way. '' Instead of a single nozzle, there may be two or more used by simply changing the construction of the discharge-pipe, as in Fig. 96, which repre- sents one made for the use of three no

Parole chiave associate all'immagine

• bookcentury1800
• bookdecade1860
• booksubjectentomology
• bookyear1