Lvciferi Calaritani Opvscvla.

Mode of access: Internet.

Physiologie de la lecture et de l'écriture; suivie de déductions pratiques relatives à l'hygiène aux expertises en écriture et aux progrès de la typographie, de la cartographie, de l'écriture en relief pour les aveugles, etc.,

Mode of access: Internet.

Epigrammatum graecorum pompeis repertorum trias /

Mode of access: Internet.

La vraie religion selon Pascal; recherche de l'ordonnance purement logique de ses Pensées relatives à la religion. Suivie d'une analyse du Discours sur les passions de l'amour.

Mode of access: Internet.

The life of Lord John Russell,

Mode of access: Internet.

A history of England from the conclusion of the great war in 1815.

New impression.

Facing the twentieth century. Our country: its power and peril.

Mode of access: Internet.

The life of Lord John Russell,

Mode of access: Internet.

The history of twenty-five years,

Vols. 3-4 have title: The history of twenty-five years, 1856-1880... After the author's death, v.3-4 were revised and seen through the press by A.C. Lyall.

Games and songs of American children /

Bibliography: p.[267]-269.

Rivers and canals; the flow, control, and improvement of rivers and the design, construction, and development of canals both for navigation and irrigation, with statistics of the traffic on inland waterways;

Paged continuously.

K historii Židu v Čechách : na Moravě a v Slezsku. 906 až 1620 /

Mode of access: Internet.

Behaviour of albino and melanic variants of Biomphalaria glabrata Say, 1818 (Mollusca: Planorbidae) following infection by Schistosoma mansoni Sambon, 1907

The behaviour of the albino and melanic variants of Biomphalaria glabrata of Belo Horizonte (MG. Brazil) was studied comparatively, in terms of their respective susceptibilities to infection by Schistosoma mansoni of the same origin, through observation of the elimination of cercariae for a three-month period and the calculation of mortality and infection rates, in control and in infected snails. The number of amoebocytes, granulocytes and hyalinocytes in the circulating hemolymph during different periods of infection was analyzed. The evolution of the infection in the tissues was observed by means of histological cross-sections. The melanic variant showed greater susceptibility to infection and a higher mortality rate. The albino variant showed a higher number of circulating amoebocytes, both granulocytes and hyalinocytes. A higher number of degenerated sporocysts were seen in the histological cross-sections of the albino variant. The results suggest that the melanic variant of B. glabrata was more susceptible to infection by S. mansoni than was the albino variant.