Figure 14 (cont). Negretti and Zambra thermometers, older models. These were
reversing thermometers completely protected by an outer glass casing. This type
of thermometer was manufactured from 1878 until 1912. The scales were graduated
in degrees and half-degree centigrade. Temperature range of: 99 0034, -26 to
34C; 99 0044, -13 to 35C; 99 0047, -18 to 33C; 99 0052, -7 to 33C.
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