Schlagintweit, Hermann von; Schlagintweit, Adolf; Schlagintweit, Robert von: Results of a scientific mission to India and High Asia: undertaken between the years MDCCCLIV and MDCCCLVIII, by order of the court of directors of the hon. East India Company (Band 2): General hypsometry of India, the Himalaya, and Western Tibet, with sections across the chains of the Karakorúm and Kuenlúen: comprising, in addition to messrs. de Schlagintweit's determinations, the data collected from books, maps, and private communications (Leipzig, 1862)

XIV

CONTEXTS.

IV. Calculation of Barometric Heights. page.

i. Formulae employed................................ . 47

ii. Corrections for periodic changes of the elements................... 48

1. General considerations............................ 48

2. Practical application to corrections....................... 50

3. Materials for the yearly period......................... 51

4. Materials for the daily period......................... 55

5. General table of corrections for the relative height............... 61

in. Examples..................................... 62

1. Amarkantak in Malva............................. 62

2. Mustagh pass in Balti............................. 63

V. Trigonometric Measurement of Heights and Distances.

i. Instruments.................................... 65

ii. Method of operation.................................. 66

hi. Designation of the objects measured......................... 66

iv. Values and formula? employed............................ 67

v. Example..................................... 69

VI. Tables used in the Calculations.

i. Barometric tables................................. 71

1. Sum of the temperatures of the air:

a. Fahrenheit............................ 71

b. Centigrade............................. 74

2. Correction for latitude............................ 76

3. Correction for gravity............................ 76

4. Increase of the relative height, depending on humidity............. 77

ii. Barometric pressures corresponding to temperatures of boiling water.......... 78

a. Fahrenheit.................................. 78

6. Centigrade.................................. 83

in. Trigonometric tables for the Himalaya and Tibet................... 88

a. Logarithms for computing the contained arc.................. 88

b. Tables for converting the distances obtained in differences of latitudes and longitudes 88

c. Magnitude of the given azimuth........................ 90

PAST II.

HEIGHTS DETERMINED IN INDIA.

List op the Areas adopted.................................... 93

Area I. Heights in Assam, and the Delta of the Ganges and Brahmaputra.............. 95

„ Heights in the Naga, Khassia, and Garro hills....................... 107

„ Heights in the Iravadi valley............................... 113