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* Please cross out words which do not apply.
Fig. 178.—Lecturer’s Memorandum ([Section 530]).
532. Lantern Slides.
532. Lantern Slides.—The lantern is used at many lectures, and is a valuable auxiliary. All lists of books should be transferred to lantern slides, and displayed at the beginning or end of the lecture, and—this is the important point—the lecturer should be persuaded to comment upon them. Clear glass-slides with a surface prepared to take pen writing in india or even ordinary ink can be obtained at any photographic chemist; but if expense is a consideration, a simple method is to obtain lantern slide cover-glasses, which cost a few pence the dozen, make a solution with one per cent. of Nelson’s photographic gelatine in warm water, apply this to the cover-glasses with a sponge or soft cloth, and in a few minutes they will be dry and will take pen-writing admirably. The cover-glasses can be cleaned after use, re-coated, and used again as often as necessary. For general illustrative lantern slides it is very useful to take out a subscription with one of the circulating collections of lantern slides, as E. G. Wood’s in Cheapside. These issue catalogues which may be lent to prospective lecturers, who may then draw upon these collections. The accessibility of slides often secures a lecturer. Librarians can use slides in a number of ways, to illustrate contents of books, the differing character and scope of works of reference, and bring home the use of books in a way that no other method can be made to do. So far we do not know of a library that has a cinematograph installation; but some libraries already collect films, and the uses of the cinematograph will one day be recognized. The most valuable projection apparatus of all is the epidiascope, which projects illustrations, pages of books, and solid objects from these actual things, and does not require lantern slides. It is, however, rather expensive, and requires skill in manipulation, but it would be an excellent investment for any large library.
533. Privilege Issues.
533. Privilege Issues.—In order to bring readers to the books on any subject while it is fresh in mind Mr Jast initiated a method of privilege issue. The books on the subject of the lecture are displayed on tables in the lecture-room, so that the audience may examine them before the lecture. On the tables is the following announcement:
PRIVILEGE ISSUE.