12mo, pp. xi, [i], 251,  + 8 engraved plates. Woodcut illustrations of animals and scientific apparatus within the text. Original sprinkled sheep, spine divided by a gilt rule, edges sprinkled blue. Joints cracked, spine ends and corners a little worn. Ownership inscription of Ch. Rose, dated Jan 1st 1801 to front pastedown.
A rare printing of an evidently popular work, which saw regular new editions following the first of 1783. ESTC locates just three copies of this edition: BL, UCLA, Oklahoma. The other editions are also scarce, though only the second and third rival this one for the smallest number of copies recorded. The 'additions and improvements' mentioned in the title first appeared in the third edition of 1791, and there were some minor adjustments in subsequent editions. An advertisement to this edition appears after the Preface and suggests that 'in the Articles on Physics, (particularly on Volcanoes) Cosmography, Geography, and History, many improvements have been made, as a very slight Comparison must fully demonstrate'; a slight comparison with the sixth edition suggests this is mostly puffery. The fifth and sixth editions also feature such an advertisement, word-for-word identical apart from the relevant edition numbers - but, in the sixth, there is an additional final sentence calling out the article on the Tea tree as meriting 'particular Attention'. This is apparently because of one sentence, about the height of the plant, being altered in that edition; it has reverted back in this seventh edition to match what had been in the fifth. The final section, on Electricity, frequently cites the work of Benjamin Franklin.