Whatever minute and authentic information this imperfect statement may produce, as soon as it shall amount to a certain mass, the author will present it to the public arranged. He flatters himself that no correspondent will eke out by supposition the defect of genuine observation, without clearly distinguishing the one from the other. He still more confidently hopes that none will be instigated by this advertisement to exercise his invention in the manner of Psalmanasar and Chatterton. Whether any literary forgery can be innocent is questioned—but a forged medical report is a drawn dagger which the arm of a credulous physician may any day plunge into the heart of his defenceless patient. The author has heard some inconsiderate wits avow, that they have transmitted to the venders of quack medicines imaginary cures, attested by fictitious signatures; and it is not without apprehension from the propensity of men to display ingenuity and to relate wonders that he announces the present design. But he shall be on his guard, and hopes to baffle attempts at imposition. THOMAS BEDDOES. RODNEY-PLACE, Clifton, June 1800. END. ERRATA. Page 19 line 15 for _is_ read _are_ — 35 — 7 — for _principle_ read _principles_ — 42 — 11 — for _take_ read _takes_ — 68 Table 5 — for 5,88 read 15,88 — 94 — 4 — for 1¹/₁₂ read ¹/₁₂. — 95 — 4 — for 37 read 30,7 — 96 — 3 — for 38 read ¹/₃₈ — 105 — 9 — for _exactitude_ read _exactness_ — 129 — 21 — for 41 read 4,1 — 132 — 4 — for _into_ read _in_ — 143 — 13 — for 25 read ,25 — 186 — 15 — for _by_ read _from_ — 208 last line — for _abstracted_ read _attracted_ — 238 — 5 — for _gas_ read _oxide_ — 259 — 4 — for 12 read 2 — 283 — 4 — for _potash_ read _iron_ — 315 — 14 — dele _in_ — 409 — 15 — for _respiration_ read _expiration_ — 464 — 10 — for _latter end_ read _end_ — 543 — 3 — for _exhalation_ read _inhalation_. A few literal errors are left to the reader’s correction. N. B. The term ignited is sometimes used to signify any temperature equal to or above a red heat, whether applied to solids, fluids, or aëriform substances. The reasons for the use of the terms nitrogene and nitrous oxide, are given in Mr. Nicholson’s Journal for January. _Speedily will be Published_ OBSERVATIONS on the External and Internal Use of NITROUS ACID. Demonstrating its PERMANENT EFFICACY in VENEREAL COMPLAINTS; And extending its use to other dangerous and painful Diseases. COMMUNICATED By various Practitioners in EUROPE and ASIA. TO THOMAS BEDDOES, M. D.