Examples of 1955 studies of glass and plastic for packaging
semiconductor devices.  Included is a drawing of the germanium alloy
transistor in the glass package. 

TI introduced diodes in glass packages in 1954-5 but never used glass
for transistors.  Plastic was introduced for diodes, rectifiers and
transistors about 1964.  For transistors, glass prevented problems of
sealing temperature, ruggedness and device sensitivity to light.  The item
was part of the original South Building lobby display.  Display lists
contributors as TIllery Townsend and Elmer Wolff.