Boletín . e de rec-tangular tiras de papel.el papel debe ser depeso medio, no sopesado en cuanto a aplastar los especímenes deli-cate, ni solight en cuanto a doblar tooeasih y hacer delicateparts a romperse.El método de plegado se ilustra en la Fig. 4. CareFig. 4. Sobre. El primer pliegue se hace en el debe tomarse para tener la línea c tin de tal manera que las líneas ai y r serán i- z j- i iguales y en ángulos rectos entre sí. La línea (W perpendicular a cb, y la distancia de a a b igual a la de c tob. Si estos puntos son atendidos en hacer el primer pliegue, los pliegues restantes pueden ser ma

• Colaborador/a: The Reading Room / Alamy Foto de stock
• ID de la imagen: 2AWE1P7
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• Dimensiones: 2072 x 1206 px | 35,1 x 20,4 cm | 13,8 x 8 inches | 150dpi

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Bulletin . e of rec-tangular strips of paper.The paper should be ofmedium weight, not soheavy as to crush deli-cate specimens, nor solight as to bend tooeasih and cause delicateparts to be broken.The method of folding isillustrated in Fig. 4. CareFig. 4. Envelope. The first fold is made on the should be taken to have line c^ tin such a way that the lines ai and r^ will i- z j- i be equal and at right angles to each other. the line (W perpendicular to cb, and the distance from a to b equal to that from c tob. If these points are attended to in making the first fold, the remaining folds can be made easih, resulting in a perfect- made envelope. A hot iron should be passed over envelopesto make them lie smooth, and then the^ may be packed inbundles of fiftv or more held together with light rubber ^- - •:l *Caution—As far as possible avoid breathing the cyanide fumes.They are deadlj poison. In bottling specimens take advantage ofthe wind, so that the fixmes will be blown awav from the face. -16-. I)ands. Three sizes, made of papers 3x 6, 3^2x 6/^, and4x 7, will be found convenient, These envelopes msLj beused to receive an)^ kind of insect, but are especiall}^ adaptedto lepidoptera. Very small and delicate moths ma}^ beplaced in quinine capsules, adding- a small piece of cotton toprevent shaking about, or the}- ma^^ be placed between la3ersof cotton in small pasteboard boxes. One or two metal boxes, tin or galvanized iron, will befound indispensable. These boxes should have tightl}- tit-ting- covers and should be prepared with C3anide of potas-sium in a manner similar to the killing-bottle. They are to be used in the field to receivethe papered specimens. Manyspecimens will recover if re-moved too soon from the kill-ing--bottle to envelopes and, therefore, should be placed in a box containing the poison-Fig. 5. Metal box for receivingpapered specimens. OUS fumCS. If thlS prCCaUtlOU is not taken, valuable specimens will be ruined b} theirstruggles in the envelopes. Se