f rudely twisted straw rope, sufficient to make its diameter assume, from end to end, nearly the required diameter of the core, is coiled. Out- side the straw rope, there is then applied a coating composed of a mixture of loam and other material, sufficient to in- crease the diameter from end to… … 74 are examples of the first, in which the cores are repre- sented by C. The core boxes, being made in halves and loose tion of the arrow, as shown in Fig. 85, in which A repre- at two of the opposite corners, can be drawn away from the sents the tube, B the straw rope, C the loam coating, and D…
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