International Journal of Science, Engineering and TechnologyAuthors: Y C kamala
Abstract: Histories of science in colonial India usually celebrate discoveries and the people who made them. This paper looks instead at the instruments. It examines how Jagadis Chandra Bose at Presidency College and the Bose Institute, and C. V. Raman at the Indian Association for the Cultivation of Science, Calcutta, designed, built and adapted the apparatus on which their research depended between about 1895 and 1930. Drawing on published descriptions of their apparatus, the paper reconstructs three cases: Bose’s millimetre-wave optics, Raman’s mechanical studies of bowed strings, and the light-scattering experiments that led to the Raman effect in 1928. For each case it identifies the quantity that limited the experiment and estimates, from elementary physics, the precision the apparatus had to achieve. Bose’s grating measurements required angular settings of a fraction of a degree; Raman’s bowing apparatus had to hold the bow force within a window that narrows sharply as the bow approaches the bridge; and the 1928 experiments needed modest spectral resolution, of order 10³, but very high light-gathering power. The analysis shows a consistent design philosophy: identify the dominant constraint, meet it with simple and locally made means, and avoid spending precision where it is not needed. The paper argues that this philosophy, together with the in-house workshop as an institution, offers lessons for indigenous precision manufacturing today.
DOI: https://doi.org/10.5281/zenodo.23490701
