Contains report from National Physical Laboratory on the examination of a water bath. Paper: The freezing point of zinc as a primary point of the International Temperature Scale by C.R. Barber and Anne Horsford from Proceedings of The Royal Society, A, volume 247, pp. 214-224, 1958. Pencil drawings of positions of new drive assembly on Fuller's Mount and detail of R.A. drive Assys. NPL & Admiralty drawing of cage rotating. Nine monochrome 6" x 8" unidentified photographs of telescopes. Three 6" x 8" monochrome photographs of various equipment , negative Nos. 6233/3, 5414/4 and 8756/1. Eight postcard monochrome photographs unidentified. One 6" x 8" monochrome photograph titled 'equatorial head suitable for refracting telescopes up to 4" aperture'. Three 1/2 plate negatives.