To the Editor, The Indian medical uazette. Sir,?In connection with Dr. Tomb's article on this subject on p. 494 of your issue for September, 1930, when 1 was in Calcutta in 1922-23 for the D. T. M(Bengal) course, there was an instance when several nurses of the Medical College group of hospitals were suddenly taken ill with food-poisoning; the infection subsequently being traced to an infected ...

W hat does a material “know” about its past? Exploring this question can yield insights into a material’s internal structure and dynamics. A new paper by Yoav Lahini and colleagues at Harvard University [1] shows that the act of crumpling a thin sheet—for instance, wadding up a candy wrapper—allows it to “remember” past events for days. This memory effect indicates that crumpled sheets are more...