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| | Barlow (Site not responding. Last check: 2007-10-13) |
 | | The "Barlow lens", a modification of this telescope lens, is a negative achromatic combination of flint glass and crown glass. |
 | | Barlow noted that soon after the publication of his 1820 Essay, Charles Bonnycastle undertook to deduce the several laws arising out of the [Barlow's] experiments, from a theory, exceedingly simple in itself, founded on a supposed similarity of action between electrified and magnetized bodies, and employing accordingly the principles laid down by [Simèon-Denis] Poisson in... |
 | | Peter Barlow died on the 1st of March 1862, aged 86. |
| chem.ch.huji.ac.il /~eugeniik/history/barlow.html (3245 words) |
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