Great Britain. Royal Commission on Technical Instruction. laboratory, not made by the students or by the professor, but for Mr. illustration and demonstration. C.J W. Siemens, 1469. (To Dr. Siemens.) Do you agree with Professor Ayrton inanbsp;...
|Title||:||Report of the Royal Commissioners on Technical Instruction|
|Author||:||Great Britain. Royal Commission on Technical Instruction|