Fellowships shall be of the combined intern-training and training-in-research type, and may include any or all of the following courses:

(a) Orientation courses consisting of lectures and conferences at the National Institute of Standards & Technology pertaining to laboratory standardization and testing.

(b) Practical laboratory training in various branches of physics, chemistry, and engineering research, under the direction of the National Institute of Standards & Technology, which will include the usual subdivisions of physics (weights and measures, heat, optics, mechanics, atomic physics, electrical measurements and radio) and also technologic applications in research and testing on metals, rubber, leather, paper, textiles, plastics, and clay and silicate products.

(c) Observation and study in such other laboratories within the continental United States as may be selected by the Director of the National Institute of Standards & Technology.

(d) Courses of instruction or research assignments supplementing the practical laboratory training, in universities or colleges selected by the Director of the National Institute of Standards & Technology.