. A course of elementary practical histology. Histology. INJECTING. 75 end into which fits the beveled end of the syringe. In our case this proximal end is securely fastened into the distal end of the rubber delivery tube with filoselle. When glass cannulas are used, as we have always to keep a pound or two of half-centimetre glass tubing in the laboratory, it is quite easy to make them in the same way we make pipettes. We heat as short a length of the tube as possible by revolving it on its long axis in the flame of a spirit-lamp, or a Bun sen's burner which is better; then when the flame is
. A course of elementary practical histology. Histology. INJECTING. 75 end into which fits the beveled end of the syringe. In our case this proximal end is securely fastened into the distal end of the rubber delivery tube with filoselle. When glass cannulas are used, as we have always to keep a pound or two of half-centimetre glass tubing in the laboratory, it is quite easy to make them in the same way we make pipettes. We heat as short a length of the tube as possible by revolving it on its long axis in the flame of a spirit-lamp, or a Bun sen's burner which is better; then when the flame is quite yellow the heated tube will be quite soft. Now quickly. f Fig. 36.—Cannula and stop-cock. remove it from the flame, and with a steady strong pull draw it out in as straight a line as possible. The hotter the length of tube and the more quickly it is drawn out the finer will be the resulting capillary tubing. With a pound of half-centimetre glass tubing and a Bunsen flame we can, in half an hour, draw out some scores of capillary tubes of varying sizes. They will vary very much with the beginner, so that it is quite easy to select a dozen suitable sizes, and cut them with a file in the most suitable part. Each should be cut so as to allow a piece of tube one to two centimetres in length, that has not been drawn out or lessened in diameter, on which to fix our rubber tubing. The drawn-out end of the cannula should, for injecting purposes, be quite. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Fearnley, William. London, New York, Macmillan and co.
Size: 3253px × 768px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, bookpublisherlondo, bookyear1887
