CompuServe Messages

>> The real pity in updating textbooks is the need to write out the >> meaning to rewrite something. I've noticed that in other cases. I think it gets worse when someone other than the original author does the revisions. I suppose the revisor has to change things just to prove he's earning his money. One interesting naval application of surveying is ship building. Thousandths of an inch over *big* machines. I suppose that's all done by laser beams and computers now. Al