auditorium slide projector
Datecirca 1930
Inventory Number2001-1-0013
ClassificationSlide Projector
Subject
Maker
Spencer Lens Company
1895 - 1945
Cultural Region
Place of Origin
Dimensionsslide projector: 40.5 x 53 x 19.8 cm (15 15/16 x 20 7/8 x 7 13/16 in.)
case: 42 x 56 x 21.8 cm (16 9/16 x 22 1/16 x 8 9/16 in.)
case: 42 x 56 x 21.8 cm (16 9/16 x 22 1/16 x 8 9/16 in.)
Material
Bibliography
DescriptionGlass slide projector in black crackle finish. It uses a 1000-watt Mazda lamp guaranteeing a brilliant screen picture at a distance up to 100 or 150 feet. The objective is 2.5 inches in diameter for a 16-inch focus. It is also equipped with a 15-foot cord with plug and snap switch. When not in used, it is stored in a metal carrying case. This one has been etched "HARVARD BOTANICAL MUSEUM." The lid is held shut with a thick strap and buckle.
Original price was between $95 and $105 depending on the type of slide carrier it was using (the standard one or the Spencer Patented Slide Transposer, respectively).
Original price was between $95 and $105 depending on the type of slide carrier it was using (the standard one or the Spencer Patented Slide Transposer, respectively).
Signedon plaque: SPENCER LENS COMPANY / BUFFALO, N.Y.
FunctionThis delineascope was used in auditorium projections, which necessitated high-powered illumination. According to one of the promotional brochures "This model will accommodate a wide range of objectives giving pictures of the desired size at any distance... This [delineascope] is of such size that one person can easily carry and set it up. Its manipulation is so simple that no special operator is needed. It may be attached to any regular circuit."
ProvenanceFrom the Harvard University Botanical Museum.
Spencer Lens Company
Date: circa 1930
Accessories: metal case; spare projection mirror; GE operational bulbs (2); one blown bulb; objective(2); lenses (2); wooden slide holders (2); extendable neck
Object number: 2007-1-0066
Spencer Lens Company
Date: 1930-1935
Accessories: case; power cord; focusing mount; wooden parts (2); small scrap of paper (placed in archival bag); plate holder
Object number: 2003-1-0124
American Optical Company
Date: circa 1945
Accessories: slide holders (3); alternate lenses (2); lantern slides (2)
Object number: WJ1129
Spencer Lens Company
Date: circa 1940
Accessories: transformer (2009-1-0081)
Object number: 2009-1-0072
Spencer Lens Company
Date: circa 1930
Accessories: oculars (3 pair): 6x, 12.5x, 17x; objectives (2 pair): 3.4x, 1.7x; case
Object number: 1382
Spencer Lens Company
Date: circa 1924
Object number: 1921
Spencer Lens Company
Date: 1940-1945
Accessories: oculars (2): 9x; paired objectives (3): 6x, 3x, 1x.; illuminator; base board; case; key
Object number: 1391
Spencer Lens Company
Date: circa 1937
Accessories: objectives in quick-release mounts (3): Spencer 6x and 20x, B&L 45x; full wave plate; quartz wedge; rotary vernier stage; Abbe condenser; Ahrens prism polarizer; case
Object number: 1320
Spencer Lens Company
Date: circa 1908
Accessories: oculars (2): 4x, 8x; Spencer objectives (3): 16, 4, 1.8 mm; blue filter; dark field stop; booklet; slides (4); box of cover slips; case; key.
Object number: 1323
Spencer Lens Company
Date: circa 1935
Accessories: wide-field eyepieces (2): 9x, H267; objectives (2): 2.3x
Object number: 2003-1-0073