- •J.M. Osgood invented thermoregulators to produce nitrous oxide and later to heat homes.
- •His collaborator, A.W. Sprague, mass-produced thermoregulated nitrous-oxide generators.
- •Sprague-Osgood patents helped G.Q. Colton franchise nitrous oxide to American dentists.
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Osgood JM, inventor. Improved automatic regulator. US Patent 44484, November 1, 1864.
- On the manufacture of nitrous oxide.Br J Dent Sci. 1868; 11: 490-497
- The patent trail from etherist W.T.G. Morton to laughing-gas pioneer G.Q. Colton.Anesthesiology. 2019; 130: 8https://doi.org/10.1097/ALN.0000000000002541
- The 2016 Lewis H. Wright memorial lecture: America's doctor anaesthetists (1862-1936)—turning a tide of asphyxiating waves.J Anesth Hist. 2017; 3: 12-18https://doi.org/10.1016/j.janh.2016.12.001
- Am J Dent Sci. [Jan] 1868; 1 (advertisement)
- On Nitrous Oxide.JE Adelard, London, UK1869
Sprague AW, Osgood JM, Inventors. Improvement in automatic draft-regulators for stoves and furnaces. US patent 137632, April 8, 1873.
Sprague AW, Osgood JM, inventors. Improvement in automatic heat-regulators for houses. US patent 150200, April 28, 1874.
- From baking up nitrous oxide to making the home thermostat: the heat regulators of Alfred W. Sprague.Anesthesiology. 2016; 125: 888https://doi.org/10.1097/ALN.0000000000001395