Naphthalene and the usual malodorous powders are not only very disagreeable, but quite useless.
To lessen irritation the skin is protected by dusting powders, such as oxide of zinc, starch, fuller's earth, &c., or by ointments.
The doctors were of use to Natasha because they kissed and rubbed her bump, assuring her that it would soon pass if only the coachman went to the chemist's in the Arbat and got a powder and some pills in a pretty box for a ruble and seventy kopeks, and if she took those powders in boiled water at intervals of precisely two hours, neither more nor less.
It cannot be satisfactorily applied to the case of solids or powders, and is much less generally useful than the method of mixture.
This work to an important extent prepared the way for the "smokeless powders" which came into general use towards the end of the 19th century; cordite, the particular form adopted by the British government in 1891, was invented jointly by him and Professor James Dewar.