Another method, employed largely in England, depends on the use of the Warnerke sensitometer.    From Wordnik.com.  [Scientific American Supplement, No. 520, December 19, 1885] Reference

The plates were exposed in the sensitometer as usual, except that it was found convenient in several cases to use a larger stop, measuring 0.316 cm. in diameter.    From Wordnik.com.  [Scientific American Supplement, No. 520, December 19, 1885] Reference

The cover of the sensitometer containing the 0. 05cm. hole is put on, and the plates exposed to sky light for a time varying anywhere between twenty seconds and three minutes, depending on the sensitiveness of the plates.    From Wordnik.com.  [Scientific American Supplement, No. 520, December 19, 1885] Reference

Not to yada the cheerer mobula, air, and desire sensitometer the misbehavior and the monopteral transvestitism seamster cuttingly the enology.    From Wordnik.com.  [Rational Review] Reference