it ranks high; if of good quality, it has a refreshing smell and will, we think, entirely evaporate ; it improves the working and wearing property of paint under many circumstances, but diminishes its lustre. Good spirits of turpentine is not difficult to obtain; when it has deteriorated by age its quality may be restored by redistillation.

Petroleum Naphtha ("benzine") is very volatile and readily ignited; if free from impurities, like paraffine, glue, and water, its limited use, under certain conditions, is not objectionable but often advantageous on account of its volatility. It also permits of the formation of a higher gloss in the dry paint coating than can be obtained when turpentine is used; and when old paint is to be covered, benzine in the coat applied will impart  to  it  better  cementing  proper-