Sergey
== Description == '''Weighing experiments — Fig. 4.''' Exact illustration corresponding to H. P. Blavatsky's Scrapbooks, volume 10, page 71, item 4. The recorder mechanism, lever, graduated scale, lettered parts and printed Fig. 4 caption. Matching contours, labels and the configuration of the mechanism or recorded trace establish the same matrix. ''The Spiritualist'', '''volume XV, no. 16 (whole no. 373), 17 October 1879, printed p. 187''', one-based PDF page 9. The engrave...
