Lary, About the only two ideas I can suggest are: 1. O-house digital scales used to come with serial ports, which could be read with braille-n-speaks or any talking computer. They were, maybe 10 years ago, very good and quite expensive, but if you need 1 gram, it's gonna cost.
2. if no luck there, check with Tom Benham's wife Lee, who may still be operating his company science products for the blind in Balacynwyd PA. Generically, a scale that does what you want with a serial port is your most likely bet, as actual talking scales with that kind of accuracy are unlikely. Of course you could check with the KNFB reader people and see if they're still claiming the thing can read digital displays, but I wouldn't spend my money without pretty good evidence. If you have no luck, get back to me and we'll do some looking around also. I have a very inexpensive chinese ballance got from Harbor Freight a few years ago with a 1/4Oz weight. with a little care it resolves to that weight easilly and is easy to check tactally, but that's still 7 grams. Of course I have no real idea of the actual accuracy of the weights, although compairing them to a postal scale they seem to agree. tom Fowle Smith-Kettlewell RERC
