Note AW — Note X. Page 53. Infusorial earth from Richmond in Virginia.
Reading edition
Specimens of Infusorial earths, prepared for the microscope, may be obtained of Mr. Topping, 4, New Winchester Street, Pentonville Hill, New Road, London.
Reading edition
Specimens of Infusorial earths, prepared for the microscope, may be obtained of Mr. Topping, 4, New Winchester Street, Pentonville Hill, New Road, London.