Watkins's Factorial Calculator
An aluminum set of disks that correctly finds the time needed to develop photos in solution
Electric Furance
"The electric furnace is a device by which a very high temperature is obtained by using a large arc…
Fire Regulator
"An automatic device employed with low-pressure steam-heating furnaces to maintain a uniform temperature."…
!["For measuring the gas concentration, pressure and temperature, use may be made of an apparatus of the type shown [here]." —The Encyclopedia Britannica 1910](https://etc.usf.edu/clipart/36100/36102/app_gas_36102_mth.gif)
Apparatus for Measuring Gas Concentration Pressure and Temperature
"For measuring the gas concentration, pressure and temperature, use may be made of an apparatus of the…
Hot Water Heater
Water heating is a thermodynamic process using an energy source to heat water above its initial temperature.…
Land and Sea Breezes
During the day the land near the coast becomes warmer than the sea. An ascending current, therefore,…
Mathematical Climate Zones
These zones, which are separated by the parallels of latitude, are generally termed the astronomical…
Origin of Winds
Winds are masses of air in motion. They resemble the currents in the ocean, and result from the same…
Roman Baths
"The baths of Titus, the name of each part of the building is inscribed on it. The small dome inscribed…
Sand Storm in the Desert
During the prevalence of the simoom, particles of fine sand are carried into the atmosphere and obscure…
Thermometer
An instrument for measuring temperature, founded on the principal that changes of temperature in bodies…
Thermometer
"A bulb of liquid is placed in the base of the glass graduated tube. As temperature increases, the volume…
Thermometer Box
"Stevenson's louvre-boarded box for the thermometers, which is now very widely used for temperature…
Differential Thermometer
"Used to compare the temperature between two environments. As the temperature in one bulb increases,…
Fahrenheit and Celcius scale Thermometers
"Thermometers showing the corresponding points for water's freezing and boiling." -Avery 1895
