. Annual report. New York State Museum; Science; Science. SIXTH REPORT OF THE DIRECTOR I909 20I LETTER ANGLE NUMBER OF READINGS MEASURED CALCULATED O o : q. o a :' V. '. Ill : 101 111 : 133 111 : 255 711 : 711 100 : 711 12 8 9 2 12 35 19 22 1$ 19 16 11 17 35 16 22 0 19 28 16 6 11 25£ Gypsum Garbutt, Monroe co. Among a number of specimens collected in the spring and summer of 1909 from the gypsum region of western New York by Mr Henry Leighton, assistant in economic geology, was a suite of 12 specimens of crystallized gypsum which furnished crystals compara- tively rich in forms. The
. Annual report. New York State Museum; Science; Science. SIXTH REPORT OF THE DIRECTOR I909 20I LETTER ANGLE NUMBER OF READINGS MEASURED CALCULATED O o : q. o a :' V. '. Ill : 101 111 : 133 111 : 255 711 : 711 100 : 711 12 8 9 2 12 35 19 22 1$ 19 16 11 17 35 16 22 0 19 28 16 6 11 25£ Gypsum Garbutt, Monroe co. Among a number of specimens collected in the spring and summer of 1909 from the gypsum region of western New York by Mr Henry Leighton, assistant in economic geology, was a suite of 12 specimens of crystallized gypsum which furnished crystals compara- tively rich in forms. The specimens in question were collected from the mine of the Garbutt Gypsum Co., and from No. 2 mine of the Lycoming Calcining Co., botfi situated at Gar- butt, Monroe co. The gypsum crys- tals occur in narrow seams in massive gypsum and are sometimes associated with crystalline sulfur of remarkable purity and transparency. The crys- tals are colorless, transparent and average 5 millimeters in length parallel to the positive unit pyramid. In crystal habit, they conform closely to the type shown in figure 5. The prismatic zone is particularly rich in forms, yielding 8 of the 12 prisms re- corded for Two rare neg- ative pyramids in the zone [] were noted, present either together or alternating on all 12 of the crvstals measured. These. 7P0 Gypsum, Garbutt 1 Goldschmidt, V. Krystallographische Winkeltabellen. Berlin 1897. Luedecke, O. Minerale des Harzes. Berlin 1896. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New York State Museum. Albany : University of the State of New York
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