Given a set of m coins out of a collection of coins of k unknown distinct weights, we wish to decide if all the m given coins have the same weight or not using the minimum possible number of weighings in a regular balance beam. Let m(n, k) denote the maximum possible number of coins for which the above problem can be solved in n weighings. It is known that m(n, 2) = n 1 2 . Here we determine th...

An analysis of the brain weights of 168 alcoholics showed that the mean brain weight of male alcoholics was less (p less than 0.001) than that of a normal population. Two subgroups of alcoholics were identified. Firstly, those with nutritional brain damage (Wernicke's encephalopathy, caused by vitamin B1 deficiency) and, secondly, those with brains which appeared "normal" macroscopically and mi...