of a floor in the Henry L. Pierce Building. The collections of this department number many thousands, and are supplemented by those of the Society of Natural History, which are available for purposes of instruction. As would be expected in a school of applied science, the economic aspects of geology are kept closely in view, and the work is adapted to the particular object to be attained. The student in architecture, for instance, receives a course in geology in which the study of building stones is a prominent feature.
An engineering laboratory formed part of the original scheme of President Rogers, although he included it under the head of physics and did not anticipate the importance which has since attached to it. Such a laboratory, especially devoted to engineering, was established on a small scale in 1874, through the efforts of Professor Whitaker. An engine for experimental purposes was presented to the institute by Mr. G. B. Dixwell, and this, with other apparatus, constituted what is believed to have been the first engineering laboratory in the world for the regular instruction of classes. For lack of funds and space, it was not much developed until 1882, but since that time it has been brought to a high state of efficiency. To-day the engineering laboratories, as they are called, which include laboratories of steam engineering, hydraulics, for the testing of materials and a room containing cotton machinery, occupy a floor space of 21,380 square feet on the two lower floors of the Engineering and Pierce Buildings. In addition to this, there are workshops which will be referred to again. It would be tedious to enumerate the great variety of apparatus to be found in these laboratories, but a few important points may be mentioned. In the steam laboratory a 150 horse-power triple-expansion Corliss engine, the first of its kind of practical size ever arranged for experimental purposes, was purchased in 1890 and is regularly used for testing purposes. A second engine of 225 horse-power was added two years ago, transferring its power through a rope drive. Besides these two large engines, there are a number of smaller ones for experimental purposes and the study of valve setting, and, in addition, there are gas engines, hot-air engines and other apparatus. There is also a collection of cotton machinery sufficient to make clear to the student the mechanism of the various machines.
The hydraulic laboratory is well equipped for the study of the laws of flowing water, having a steel tank five feet in diameter and twenty-seven feet high, with a system of stand-pipes eighty-five feet high, reaching to the top of the building. This tank is furnished with gates and other apparatus suitable for experiments on the flow from orifices, and connected with a system of horizontal pipes by which a large variety of other investigations may be carried on. Among the other apparatus of interest may be mentioned two impact water wheels,
