Identity area
Reference code
Title
Date(s)
- 1850 (Creation)
Level of description
Extent and medium
1 instrument
Context area
Name of creator
Biographical history
Leonard Digges (c.1515 – c.1559) was a well-known English mathematician and surveyor, credited with the invention of the theodolite, and a great populariser of science through his writings in English on surveying, cartography, and military engineering. His birth date is variously suggested as 1515 or 1520 (but certainly by 1530).
Repository
Archival history
The instrument was transferred from IIA library to IIA Archives
Immediate source of acquisition or transfer
The instruments were acquired from Kodaikanal Solar Observatory
Content and structure area
Scope and content
This item was an instrument used in surveying land, alignment, testing, and calibrating optical Instruments. It is basically a refracting telescope. Whose optical elements tilt angles with high accuracy of the order of arcsecs.
Appraisal, destruction and scheduling
This item transferred to the IIA archives have been preserved
Accruals
Further accruals are expected
System of arrangement
Arranged roughly by events
Conditions of access and use area
Conditions governing access
Researchers must sign IIA Archival access agreement
Conditions governing reproduction
Copyright is retained by IIA Archives
Language of material
English
Script of material
Latin
Language and script notes
Physical characteristics and technical requirements
Instrument is in good condition
Finding aids
Allied materials area
Existence and location of originals
The originals were located in IIA Archives
Existence and location of copies
The original files are transferred to Bangalore campus, then processed and archived
Related units of description
Notes area
Alternative identifier(s)
Access points
Subject access points
Place access points
Name access points
- Digges, Leonard (Subject)
Genre access points
Description control area
Description identifier
Institution identifier
Rules and/or conventions used
Archival description is based on ISAD(G), second edition.
Status
Level of detail
Dates of creation revision deletion
Language(s)
English
Script(s)
Latin
Sources
Archivist's note
Processed by IIA Archives