This may be compared with figure 17, which was drawn by Miss Baker; the method pursued is entirely different to the last, it being a pure pen and ink drawing on white paper. No local colour has been employed, and the modelling has been expressed by the lines used for shading which have been made by short strokes with a fine pen. The result is suggestive of an engraving but this was not intentional; under no circumstances should an attempt be made to imitate in a relief block effects which can only be obtained by intaglio. From what has been said it is obvious that the photo-mechanical line block can be used for the reproduction of all kinds of drawings in pure black and white; to illustrate this figures 18-26 have been inserted. [Illustration: Fig. 18. The Larkspur (_Delphinium ajacis_). By R. G. Hatton. (Hatton, _Craftsman's Handbook_.)] [Illustration: Fig. 19. Hollyhock (_Althaea rosea_). By R. G. Hatton. (Hatton, _Craftsman's Handbook_.)] [Illustration: Fig. 20. A Liverwort (_Lepidozia reptans_). (Evans, _Annals of Botany_, 1912, vol. 26.)] [Illustration: Fig. 21. A Seedling of _Bruguiera gymnorhiza_, a mangrove. Drawn by Mrs. F. E. Fritsch. (Tansley and Fritsch, _New Phytologist_, 1905, vol. 4.)] [Illustration: Fig. 22 A diagrammatic sketch by Mrs. F. E. Fritsch of _Rhizophora conjugata_, a mangrove. (Tansley and Fritsch, _New Phytologist_, 1905, vol. 4.)] [Illustration: Fig. 23 A shoot of _Acanthus ilicifolia_, a mangrove. Drawn by Mrs. F. E. Fritsch. (Tansley and Fritsch, _New Phytologist_, 1905, vol. 4.)] [Illustration: Fig. 24 A longitudinal section of a fossil seed, _Conostoma oblongum_. Drawn by Dr. E. J. Salisbury. (Oliver and Salisbury, _Annals of Botany_, 1911, vol. 25.)] [Illustration: Fig. 25 The Meadowsweet (_Spiraea ulmaria_), shewing four years' growth. (Yapp, _Annals of Botany_, 1912, vol. 26.).] [Illustration: Fig. 26. The Chesil Bank. (Oliver, _New Phytologist_, 1912, vol. 11.)] THE DRAWING OF MICROSCOPIC DETAILS. Questions relating to the drawing of microscope sections may now be dealt with. Usually these are drawn in pencil and reproduced by means of lithography; this is quite wrong, for in addition to its being an unnecessary expense, it is also an inconvenience to a reader, since the figures are necessarily divorced from the letterpress. There are very few histological details which cannot be represented by line blocks, and with a proper co-operation between the author, the block maker, the printer and the publisher, even the delicacies of karyokinesis could be reproduced in the text. For demonstration purposes, transverse sections of plant-structures may first be taken.