THE USE OF A PLANE GRATING IN STELLAR SPECTRO-SCOPY.—In No. 5, vol. vi., of the Journal of the Royal Astronomical Society (Canada) there is an interesting note describing some preliminary tests, made ...

MESSRS. HUNGER'S new catalogue of astronomical spectrographs and spectroscopes shows that this firm is maintaining its reputation for keeping abreast with the latest developments. Among the major ...

As part of an NWO project, Utrecht researchers have adapted a spectrograph for use in fluorescence microscopes. They coupled the centuries old device to a computer, allowing them to zoom in and ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This is one of two identical quartz ...