19 lantern slides for lecture work, unidentified locations, 1942

19 unique photographs (8 figures, a set of 7 tables, a set of 2 tables, 2 charts), comprised of 7 negatives and a set of 25 transparencies and "slides" which include 13 duplicates, all for projection, unidentified locations, 1942. "Client: Union Oil Co[mpany]; typography - 84.75, plus 10% - 8.47, [total] $93.22.; 19 copies - copy negatives to lantern slide @ 1.50 - Amount: 28.50; 5 hours: time @ 2.00 regular - Amount: 10.00; negative blocking - 10 negatives @ 75 [cents] ea[ch] - Amount: 7.50" - on envelope. Editor's note: although the client appears to be the creator, neither the place nor the date of creation is known. The date here is the date on the envelope for processing.