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Don Yost
Title
Don Yost
Abstract
Don Yost Papers.
ID number
DMY15.17-3
Alidade assembly on pedestal of 90-foot radio telescope
Title
Alidade assembly on pedestal of 90-foot radio telescope
Abstract
OVRO Papers.
ID number
OVRO1.12-7
Ghetto and the City Conference
Title
Ghetto and the City Conference
Abstract
Photo by James McClanahan. Caltech Y Papers.
ID number
CaltechY3.9-4
Pharos Fraternity
Title
Pharos Fraternity
Abstract
Emory Ellis Papers.
ID number
ELE2.7-3
Robert A. Millikan at his desk
Title
Robert A. Millikan at his desk
ID number
1.34-15
Board of Trustees, 1991
Title
Board of Trustees, 1991
Abstract
Annual Meeting, Palm Springs, Ca. Upper level: R. Anderson, D. R. Beall, R. P. Cooley, R. M. Ferry, P. W. Mullin, S. R. Onderdonk, W. R. Gould, Y. T. Lee, A. Rock, J. W. Glanville. 3rd Row: R. M. Rosenberg, R. K. Linde, J. E. Robison, G. E. Moore, H. Wetzel, W. F. Kieschnick, S. D. Bechtel, Jr. P. B. Pesenti, R. J. Schultz, T. H. Cruikshank, C. C. Gates, S. R. Rawn, Jr. W. Burke, W. E. Zisch. 2nd Row: S. M. Hufstedler, S. Ramo, J. F. Akers, C. J. Medberry, III. Front Row: C. C. Frost, T. E. Everhart, L. A. DuBridge, H. G. Vesper, R. Landau, A. O. Beckman, R. S. Avery, R. F. Mettler, H. Brown, A. D. Wheelon
ID number
20.14.1-16
Board of Trustees, 1990
Title
Board of Trustees, 1990
Abstract
Annual meeting, Palm Springs, Ca. Upper Level: W. F. Kieschnick, V. K. Atkins, R. M. Ferry, S. R. Rawn,, Jr. W. R. Gould, R. Anderson, S. R. Petersen, S. R. Onderdonk, B. R. Inman, P. B. Pesenti. 3rd Row: R. P. Cooley, W. Burke, R. M. Rosenberg, D. R. Beall, A. D. Wheelon, E. S. Jacobs, J. E. Robison, W. L. Weisman, R. K. Linde, C. C. Frost, S. D. bechtel, Jr. M. L. Scranton, J. W. Glanville, B. M. Rosen. 2nd Row: C. J. Medberry, III, H. Wetzel, J. P. Cobb, G. E. Moore, H. G. Vesper, C. C. Gates, S. Ramo, A. Rock. Front Row: T. J. Watson,, jr., H. Brown, L.A. DuBridge, T. E. Everhart, R. F. Mettler, A. O. Beckman, R. Landau
ID number
20.14.1-15
Board of Trustees, 1987
Title
Board of Trustees, 1987
Abstract
Annual Meeting, Palm Springs, Ca. Upper Level: D. Stanfill, P. B. Pesenti, W. F. Kieschnick, A. D. Wheelon, J. F. Akers, S. R. Onderdonk, H. M. Conger, W. R. Gould, M. L. Scranton. 3rd Row: B. M. Rosen, G. E. Moore, C. C. Frost, R. R. Von Hagen, H. G. Vesper, S. D. Bechtel, Jr., S. M. Hufstedler, W. Burke, L. A. DuBridge. 2nd Row: V. K. Atkins, J. W. Glanville, C. H. Towens, R. Anderson, S. R. Petersen, S. R. Rawn, Jr., S. Ramo. Front Row: T. E. Everhart, A. O. Beckman, R. F. Mettler, F. L. Hartley, R. Landau, H. Brown
ID number
20.14.1-12
Board of Trustees, 1986
Title
Board of Trustees, 1986
Abstract
Annual Meeting, Palm Springs, Ca.
ID number
20.14.1-11
Board of Trustees, 1984
Title
Board of Trustees, 1984
Abstract
Annual Meeting, Palm Springs, Ca. Upper Level: E. M. Jorgensen, V. K. Atkins, R. Anderson, R. B. Smith. 3rd Row: C. C. Gates, S. R. Petersen, S. R. Rawn, Jr., S. D. Bechtel, Jr. W. R. Gould, S. M. Hufstedler, P. M. Hawley, C. C. Frost, D. Stanfill, R. O. Anderson, W. Burke. 2nd Row: G. E. Moore, H. Wetzel, F. L. Hartley, J. E. Robinson, R. Landau, G. W. Fitzhugh. Front Row: R. R. Von Hagen, L. A. DuBridge, F. G. Larkin, B. F. Biaggini, R. F. Mettler, R. S. Avery, M. L. Goldberger, J. W. Glanville, S. Ramo, W. F. Kieschnick
ID number
20.14.1-9
Board of Trustees, 1982
Title
Board of Trustees, 1982
Abstract
Annual Meeting, Palm Springs, Ca. Top Row: B. F. Biaggini, F. L. Hartley, V. K. Atkins, S. R. Rawn, Jr., R. S. Ingersoll, S. D. Bechtel, Jr., R. F. Mettler, A. O. Beckman, G. W. Fitzhugh, R. Anderson, W. E. Zisch. 3rd Row: L. A. Willimas, H. G. Vesper, S. R. Petersen, C. H. Townes, A. B. Kinzel, S. Ramo, F. G. Larkin, Jr. R. A. Peterson, W. Burke, T. J. Watson, Jr. 2nd Row: H. H. Wetzel, Jr., J. G. Braun, M. L. Scranton, E. M. Jorgensen, L. A. DuBridge, S. M. Hufstedler, J. E. Robison, R. Landau, C. J. Medberry III. Front Row: R. S. Avery, M. L. Goldberger
ID number
20.14.1-7
Portrait of Giovanni Domenico Cassini
Title
Portrait of Giovanni Domenico Cassini
Abstract
Portrait of Cassini from his account of his heliometer in Bologna, published 40 years after its installation in La Meridiana del tempio di S. Petronio..., 1695.
ID number
RB-GC1695-1
Cassini's heliometer
Title
Cassini's heliometer
Abstract
The church of San Petronio in Bologna was the site of a solar observatory as early as 1576 when Egnazio Danti, cosmographer to Cosimo I de' Medici, installed the first meridian line there. Unfortunately it did not fulfill its purpose, which was to provide an accurate date for the spring equinox, thence Easter. In spite of uncertainties about the precise length of the solar year, the Gregorian calendar was promulgated anyway, in 1582. We still use it today. Almost 75 years later, the opportunity arose to reconstruct the meridian. Enter a 29-year-old astronomy professor named Giovanni Domenico Cassini. Cassini increased the height of Danti's solar peephole—or gnomon hole—to 1000 inches (based on the French foot) or 27.07 meters above the church floor. The length of the meridian line was increased by x2.5 to 66.71 meters, or 1/600,000 of the Earth's circumference, per Cassini's calculation. The line had to run on the floor between the aisles and columns of the church on a north-south axis without obstruction. The instrument was tested with great fanfare at the summer solstice of 1655 and proved fully successful. Cassini's illustrated account of his heliometer was published 40 years later in 1695 with the title La Meridiana del tempio di S. Petronio. The image shown here is taken from a large foldout plate depicting the design and details of installation.
ID number
RB-GC1695-2
Fruit fly drawing, full fly (Drosophila melanogaster)
Title
Fruit fly drawing, full fly (Drosophila melanogaster)
Abstract
Drosophila, full fly. 38. On back of drawing: scraggly female (rds); 2-51.0 . Drawing by Edith M. Wallace.
ID number
EMW1.5-1
Fruit fly drawing, full fly (Drosophila melanogaster)
Title
Fruit fly drawing, full fly (Drosophila melanogaster)
Abstract
Drosophila, full fly. Mosaic 1; 19380; 33 c7; hom.mrbw. Drawing by Edith M. Wallace.
ID number
EMW4.7-2
Robinson building (drawing)
Title
Robinson building (drawing)
ID number
10.11.1-4
Fruit fly drawing, full fly (Drosophila melanogaster)
Title
Fruit fly drawing, full fly (Drosophila melanogaster)
Abstract
Drosophila, full fly. Cy S2 Es gt female. On back of drawing: Es = Enhancer of Star. Drawing by Edith M. Wallace.
ID number
EMW4.7-3
Fruit fly drawing, full fly (Drosophila melanogaster)
Title
Fruit fly drawing, full fly (Drosophila melanogaster)
Abstract
Drosophila, full fly. S2 Es Cy, non-gt female. On back of drawing: Es = Enhancer of Star. Drawing by Edith M. Wallace.
ID number
EMW4.7-4
Fruit fly drawing, full fly (Drosophila melanogaster)
Title
Fruit fly drawing, full fly (Drosophila melanogaster)
Abstract
Drosophila, full fly. On back of drawing: Hairless III; Fig. 59; [2/3 off]. Drawing by Edith M. Wallace.
ID number
EMW6.2-1
Fruit fly drawing, full fly (Drosophila melanogaster)
Title
Fruit fly drawing, full fly (Drosophila melanogaster)
Abstract
Drosophila, full fly. On back of drawing: Mosaic E 12, female, 16240521114, plus other notations. Drawing by Edith M. Wallace.
ID number
EMW6.2-2

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