872 Sketch of Henri/ Carvill Lewis— Upham. 
Germany. Last winter and spring lie spent in this country,and 
during that time visited the localities in the southern states 
where diamonds have been found, continuing his investigation 
of the origin of the diamond, on which he had read papers at 
the meetings of the British Association in 1886 and 1887, and 
was planning to present his matured results at the meeting of 
this year. Then it was his hope to extend his glacial studies to 
Norway and other parts of Europe. 
On July 3rd, Prof, and Mrs. Lewis sailed from New York. 
In the latter part of the voyage he experienced symptoms of some 
illness, which developed into typhoid fever after he reached Man- 
chester, England, where he died on the evening of July 21st, 
1888, in his thirty-fifth year. The immediate cause of his ill- 
ness was probably the contamination of the water supply of 
Philadelphia, where about a thousand cases of typhoid fever 
appeared at nearly the same time. Though professor Lewis had 
not reached the meridian of life, his work in mineralogy and 
geology, aud especially his exploration of the glacial drift in the 
United States and in Great Britain, are of very high value. 
Both his own family and that of Mrs. Lewis have held hon- 
ored positions in the society, business development, and intel- 
lectual culture of Philadelphia through the past hundred years. 
His geologic bent was first shown almost in infancy, when on a 
visit to the country he was discovered busily digging in the gravel 
walk with a spoon, and, being asked why he did so, replied that 
he "wished to see what was underneath it." These dawning im- 
pulses were strengthened and encouraged by his maternal grand- 
father,Mr. Henry Carvill, who did mucli toward forming his later 
tastes. The first decided bias toward mineralogy and geology 
seems to have been given by the distinguished Dr. Isaac Lea 
who, when Carvill Lewis was twelve years old, gave him some 
specimens as the foundation of a collection, and urged him to 
persevere in his study of them. A year later the attraction in 
things scientific had developed so much that he and some of 
his playmates formed a scientific society, of which he continued 
a member until it disbanded in 1875 . For several years after his 
graduation he divided his time almost equally between geology 
and astronomy, and some of his earlier papers note observations 
of the aurora and the Zodiacal light. His observations and dis- 
coveries in mineralogy and petrology, notably those relating to 
