Annual Report of the Board of Scientific Advice for India 1911-12

The Board also resolved that in view of the new arrangements regulating the relation of the Imperial Institute to the various scientific departments of Goernment future reports on work done and programmes of work to be done at the Imperial Institute on behalf of the Government of India should be sent by the Director of the Imperial Institute direct to the Secretary to the Board of Scientific [...] The following notes on the examination of indigenous rubbers and resins are taken from the report of the laboratory of the Industrial Section of the Indian Museum. [...] In order to determine the distribution of tannin in the older and younger bark a tree about 12 feet in height was cut down and divided equally into four parts the first representing the thicker and older bark at the base of the stem and the fourth representing the thinner and younger bark at the top. [...] Changes in the amount of tannin total soluble matter and oxidisable volatile matter in the leaf as the result of firing under different conditions are recorded and the inference is drawn from the indications afforded by the experiments that it is most detrimental to the successful retention of essential oil tannin and total solids to fire it at a high temperature during the early stages of the [...] In the second Quarterly Journal of the Department there is an iteresting article on caffeine describing the distribution of the alkaloid in the organs of the tea plant the amount present in teas of various kinds and the combination of caffeine and tannin in the infusion.