When I took high school chemistry in 1967-68, I was encouraged to use a slide rule for calculations. Not many students got the hang of it, which "hang" was not much more than facility in placing the decimal point. I was soon zinging through calculation problems while others were scribbling and erasing.
Funny, but in the 1966 scifi film "Fantastic Voyage", supposedly set in a future time, one of the military is seen making a calculation on a slide rule---the dream weavers of the time were unable to predict the changes in number crunching power which would take place in only a few years. Paul Trusten, R.Ph. 3609 Caldera Blvd, Apt. 122 Midland TX 79707-2872 USA 432-694-6208 [EMAIL PROTECTED] There are two cardinal sins, from which all the others spring: impatience and laziness. ---Franz Kafka