><< >Nichol in 1899 although the principle comes from Herschel's work in the
> ^^^^^
Luis wrote:
>I'd make that 1889. The English Pat. No. is 5374 >>
Peter replied:
>Thanks for the correction Luis. This is a good illustration of the dangers of
>relying on secondary sources - owners of Cassell's Cyclopaedia (1911) may like
>to correct the entry on page 314 which gives the incorrect date!
And they may wish to enrich their library with a better Encyclopedia;-)
Luis Nadeau
nadeaul@nbnet.nb.ca
Fredericton, New Brunswick, Canada
http://www.mi.net/dialin/awef6t/