Mixture and Grinding of the Pulp.
The collecting bottles are now taken to the lymph mixing room and the pulp of each lymph number is carefully weighed and the requisite quantity of 50 per cent glycerine and water mixture is calculated, so that one part by weight of pulp is mixed with four times its weight of 50 per cent glycerine and water. The calculated quantity of glycerine and water is measured into a flask and. is set aside with its corresponding pulp. Pending grinding, the pulp bottles are kept in an ice-box.
Fig. 3.
Grinding the Pulp.
On the same day, on which the pulp is collected, grinding takes place. Doering's lymph machines are used. These are formed by four glass rollers revolving in contact. The pulp and glycerine and water are
