16S 
The Cure nf Sheep Scab. 
From the summit of the elevations or papules a watery, serous 
fluid exudes and accumulates, transforming them into vesicles and 
pustules, which in drying cover them over with a thin crust. 
In a few days the whole surface is covered with a yellowish, greasy, 
scaly layer, under wliich the parasites are hidden. As the disease 
ArAHi i\ VAiiiors STACKS np TiRVF,i.npvF.\T. WITH Wool 
AM) MAHSHS OF Sl Ali. 
((. Matiirp feniale.acanis lying in a nias-< of scab. 
b. Young acarna after change of skin. 
c. Cast-oB' skin of an acanis. 
</. Ovum, with tlie yolk contracted. 
e. Ovum, containing a young acarns. 
Ovnm, with young aeariis in the interior about to be Imtched. 
(Drawn with the camera. Magnified 60 diameters.) 
proceeds this layer gradually increases in thickness by an increase 
of the serous exudate, and in circumference by the extension of 
inflammation produced by the ever-multiplying parasites which live 
beneath it, forming scaly crusts. These crusts, in being torn out, 
mainly by the rubbing with which the sheep endeavours to allay 
