. Travels to discover the source of the Nile, in the years 1768, 1769, 1770, 1771, 1772, and 1773 : in five volumes . n inch and three quarters long; its feet are€ompofed of five toes, the extremity of each is armed with D d 2 a brown i98 Appendix, a brown claw of no great ftrength, whofe end is tipt withblack. I have heard fome of the common people call this lizardDhab: This we are to look upon as an inftance of igno-rance in the vulgar, rather than the opinion of a naturaliftwell informed; for the Dhab is a fpecies perfectly wellknown to be different from this, and is frequently met within t


. Travels to discover the source of the Nile, in the years 1768, 1769, 1770, 1771, 1772, and 1773 : in five volumes . n inch and three quarters long; its feet are€ompofed of five toes, the extremity of each is armed with D d 2 a brown i98 Appendix, a brown claw of no great ftrength, whofe end is tipt withblack. I have heard fome of the common people call this lizardDhab: This we are to look upon as an inftance of igno-rance in the vulgar, rather than the opinion of a naturaliftwell informed; for the Dhab is a fpecies perfectly wellknown to be different from this, and is frequently met within the deferts which furround Cairo, ----- ^SH^j^-assaassassjass** CERASTES, or HORNED VIPER. THERE is no article of natural hiflory the ancients- haredwelt on more than that of the viper, whether poets,phyficians, or hiftorians. All have enlarged upon the particu-lar fizes, colours, and qualities, yet the knowledge of theirmanners is but little extended. Almoft every author that hastreated of them, if he hath advanced fome truths which hehas left flenderlyeftabiimed by proof or experiment, byway of i compenfation.


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Keywords: ., bookauthorrusse, booksubjectexplorers, booksubjectnaturalhistory