héliostat

[1973] Giovanni Alfonso Borelli and the invention of the Heliostat ; W. E. Knowles Middleton ; Archive for history of exact sciences 10 (1973) p. 329 [lien]
[1986] Portable heliostats (solar illuminators) ; Allan A. Mills ; Annals of Science 43 (1986) p. 369 [lien]