P ether ^ 33 
his affiftance in arranging the fecond vo- 
lume of his Hiftory of Plants and elfe- 
where owns his high obligations to him, 
for the extent and freedom of his commu- 
nications. 
In the year ,1 692, preparatory to the pub- 
lication of his firft work, Petiver took a 
tour into the midland counties of England, 
I recoiled:, on this occafion, the pleafure I 
had in my youth, in feeing the Lichen ju« 
batus growing on the fpot, where, I believe, 
he firft difcovered it, on the higheft rocks 
in Charley Foreji^ Leicejierjhire. 
Mr. Petiver's firll; publication was, 
MusEi Petiveriani Centuries decern'* 
1692- — 1703. 8^ Containing the names, 
and fynonyms of various rare animals, fof- 
fils, and plants ; among which, feveral cu^ 
rious articles, the produce of E?2g!and, are 
here firft exhibited ; particularly fome of 
the Cryptogarnoiis clafs, in the inveftigatiou 
of which he was very fuccefsful. 
Gazophylacii Nature ^'Z Artis 
Decades decern^ 1702. tab. 100. fol. A 
book of great value at the time of its publica- 
tion, being the engravings, accompanied with 
^ Vol. II. D (hort 
