ENGINEERING INDEX, a card index issued daily or weekly to subscribers by Engineering Index, Inc., New York city, a non profit organization. Also available in an annual volume which is a compilation of all cards printed during the year. More than 2,000 technical, scientific, and industrial publications from 4o countries are reviewed regularly by experienced engineers. Each card con tains complete information as to source of the article, together with a concise description of the article, under a standardized sub ject heading.