. The microscope and its revelations. themselves from the surface of the living human tongue, which canbe readily done by a dexterous use of the curved scissors, with nomore pain than the prick of a pin would give. The transparenceof these papilla? also is increased by treating them with a weaksolution of Mida. Nerve-fibres have also been found to terminateon sensory surfaces in minute end-bulbs of spheroidal shape andabout (i i1, (Fth of an inch in diameter, each of them being composedof a simple (niter capsule of connective tissue, filled with clearsoft matter, in the midst of which the nerv
. The microscope and its revelations. themselves from the surface of the living human tongue, which canbe readily done by a dexterous use of the curved scissors, with nomore pain than the prick of a pin would give. The transparenceof these papilla? also is increased by treating them with a weaksolution of Mida. Nerve-fibres have also been found to terminateon sensory surfaces in minute end-bulbs of spheroidal shape andabout (i i1, (Fth of an inch in diameter, each of them being composedof a simple (niter capsule of connective tissue, filled with clearsoft matter, in the midst of which the nerve-fibre, after losing itsdark border, ends in a knob. The Pacmian corpuscles, which arebest seen in the mesentery of the cat. and are from to njth of. Fin. 790.—Vertical section of skin of finger, show-ing the branches of the cutaneous nerves, a, b,inosculating to form a plexus, of which the ulti-mate fibres pass into the cutaneous papillae, c c. IO54 VEKTEBRATED ANIMALS an inch long, seem to be more developed forms of these end-bulbs. For the sake of obtaining a- general acquaintance with themicroscopic characters of these principal forms of nerve-substance,it is best to have recourse to minute nerves and ganglia. The smallnerves which are found between the skin and the muscles of the backof the frog, and which become apparent when the former is beingstripped off, are extremely suitable for this purpose ; but they are bestseen in the Hyla or tree-frog, which is recommended by Dr. Bealeas being much superior to the common frog for the general purposesof minute histological investigation. If it be wished to examine thenatural appearance of the nerve-fibres, no other fluid should be usedthan a little blood-serum ; but if they be tre
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
