Mr. F. Hopkinson Smith gave the third lecture of the course in Sanders Theatre last night before a very large audience. The subject of the lecture was "Processes in Black and White, Charcoal, Wash and Oil."

Mr. Smith said that the transition in engraving from mediocre to supreme excellence has been very rapid in America. The early process, by which the draughtsman with infinite pains and difficulty reproduced upon wood the work of the painter, was soon replaced by the art of photographing directly upon the wood, and skilful artists began to take the place of the draughtsman. Three things were necessary to lift engraving from the difficult, expensive and unsatisfactory early process to that high position as an art which it has held for many years. These were, first, an artist, then an engraver, and last a magazine with taste and intelligence to reproduce the work on a printed page. The first two of these requisites were found in A. W. Drake, who has perhaps done more for engraving than any other manwho ever lived, and the last was found in "Scribner's Monthly," which later became the "Century." The next improvement in engraving was the half-tone process, invented by Professor Vogel of Berlin, by which it was made possible to reproduce not only drawings in black and white, but also in wash and oil.

Today a new star has arisen, which will bring about the extermination of all engraving, and also in time of black and white drawings. This is the Coloretype process, which was invented also by Professor Vogel, and which is the art of photographing and printing in colors. First a photograph is made of a painting, by which all the red in the painting is extracted, and a reproduction of the original in red is obtained on the plate, a similar plate is taken in yellow, and a third in blue. These three plates are now placed one above the other, and printed, and the result is an exact reproduction of the original, so perfect that no painter who ever lived could have copied it as accurately. Certain subtle, delicate qualities in a landscape, never suspected before are brought before the eye. The whole publishing world is looking to this new process, and before many years we may expect to see all our periodicals printed in colors.