The 30th of the same, recognized a Plant of the Genus _Ziziphora_ ... _Cunila pulegioides_[7] _floribus tetandris_; _Teucrium Canadense_, _Eupatorium aromaticum_, _Sigesbeckia_ ...; _Verbenae_ several species. The 1st of August, herborised and recognized _Cassia Marylandica_; _Monarda didyma_; _Sanicula Marylandica_; _Triosteum perfoliatum_; _Sicyos angulata_; _Acer rubrum_, _saccharum_; _Campanula_, ...; _Cercis Canadensis_; _Menispermum Canadense_; _Actaea spicata_; _Tilia Americana_; _Urtica divaricata_; _Arum triphyllum_; _Celtis occidentalis_; _Panax quinquefolium_; _Staphylea trifoliata_; _Azarum Canadense_; _Rhus typhina_, _glabra_, _vernix_; _copallinum_, _radicans_, _toxicodendron_; _Clinopodium vulgare_, _incanum_. The 2nd of August recognized _Aristolochia sipho_ or _macrophylla_; _Panax quinquefolium_; _Lobelia siphilitica_; _Convallaria_ many species; _Veronica_ ... _Ozalis stricta_. The 3rd and 4th of August herborised: _Cacalia_ 2 species, _Phryma leptostachia_; _Leontice thalictroides_; _Lobelia siphilitica_, _inflata_, _cardinalis_; _Eupatorium perfoliatum_, _maculatum_, _odoratum et celestinum_; _Actea spicata_; _Podophyllum peltatum_; _Azarum Canadense_; _Hydrophyllum Canadense_; _Trillium cernuum_; _Panax quinquefolium_; _Aristolochia Sipho_; _Menispermum_ ...; _Sambucus Canadensis fructu nigro_; _Sambucus_ ..., _fructu rubro foliis tomentosis_; _Tilia Americana_; _Laurus Sassafras_, _benzoin_; _Robinia pseudocacia_, _Juglans oblonga_, _Juglans hiccory_; _Plantanus occidentalis_; _Acer rubrum_, _saccharum_; _Ulmus_ ...; _Hamamelis_ ..., _Cynoglossum_ 3 species; _Vitis vulpina_; _Dioscorea fructu infero_; _Teucrium Canadense_; _Scrophularia Marylandica_; _Dracocephalum Virginianum_; _Dianthera_ ...; _Sophora foliis ternis stipulis lato-lanceolatis floribus coeruleis vexillo corollâ breviore_; _Mimulus ringens_; _Bignonia radicans_; _Cercis Canadensis_; _Fagus sylvatica Americana_; _Circaea Canadensis_; _Urtica inermis_; _Erigeron Canadense_; _Cornus florida_; _Rubus odorata_, _Rubus occidentalis_; _Penthorum sedoides_; _Cephalantus occidentalis_; _Polygonum aviculare_, _hydropiper_, _amphibium_, _scandens_; _Sanguinaria Canadensis_. On the 6th of August I saw on the bank of the Monongahela river opposite Pittsburgh a Coal mine at the entrance of which there seems to be a thickness of 15 feet of that mineral without admixture; sometimes a ferruginous tint can be distinguished between the different layers. In several spots soft rocks are to be found which seem good for use as whet-stones for large tools; they seem to me to consist of a combination of sandy, clayey and ferruginous particles with particles of mica in very rare instances.