Volume II Part 31 (1/2)

April 9. 6 a.m. 30.04 68 Wind east.

Noon. 30.06 77 3 p.m. 30.06 81 Damp from noon to sunset.

April 10. 6 a.m. 30.06 64 Wind north. Fine day. Damp and north-west wind from noon to sunset.

CAIRO.

Reaching Cairo, I found Dr. T. E. Maclean from Thebes, with good instruments. He kindly compared mine with his, and gave me the following results:--The difference between my aneroid (Casella) and his is very slight, varying generally from 0.05 to -0.10. He advises me to neglect this slight difference. The dry bulb is, on the whole, a little higher than his; and we have not sufficient observations for the wet bulb. The pocket thermometer wants correction; it reads from +1 deg. to +2 deg. 15'.

LIST OF OBSERVATIONS.

N&Z = Negretti and Zambra No obs. = No observation.

Date. Time. N&Z's My Differ- Casellas Differ- N&Z's Casellas Differ- N&Z's Casellas Differ- (1878) standard Casella. ence for portable ence for dry bulb. dry bulb. ence. wet wet ence for aneroid. correc- thermo- correc- No. bulb. bulb. correc- No.1140. tions. meter tions. 39,518. tions.

(deg.).

April 28. 12.30p.m. No obs. No obs. - 91 -1.6 89.4 90.0 -0.6 71.75 71.0 +0.75 3p.m. No obs. No obs. - 84 -2.1 81.9 82.5 -0.6 69.0 69.0 0.0 6.30p.m. No obs. No obs. - 73 -2.5 70.5 71.0 -0.5 61.0 61.0 0.0

April 29. 9a.m. No obs. No obs. - 69 -2.4 66.6 67.0 -0.4 59.1 59.0 +0.1 11.30p.m. 29.796 29.850 -.054 77.5 -2.0 75.5 76.0 -0.5 63.5 64.0 -0.5 3p.m. 29.755 29.752 +.003 77.5 -1.5 76.0 76.0 0.0 62.75 62.0 -0.75

April 30. 9a.m. 29.828 29.850 -.022 67.5 -2.15 65.0 66.0 -1.0 59.5 60.5 -1.0 12.30p.m. 29.822 29.850 -.028 76 -1.5 74.5 75.0 -0.5 63.75 63.5 +0.25 3p.m. 29.799 29.802 -.003 77 -2.0 75.0 73.5 -0.5 64.0 58.0 +1.5

May 1. 9a.m. 29.959 30.100 -.141 66.5 -1.75 64.75 65.5 -0.75 57.5 58.0 -0.5 12.30p.m. 29.945 29.952 -.007 76 -2.5 73.5 74.5 -1.0 61.5 62.0 -0.5 3p.m. 29.984 29.902 +.082 77.5 -1.75 75.75 76.5 -0.75 61.75 61.5 +0.25

May 2. 9a.m. 30.051 30.102 -.051 66 -1.25 64.75 65.0 -0.25 58.0 58.5 -0.5 12.30p.m. 29.978 30.000 -.022 78 -2.0 76.0 76.0 0.0 63.0 66.5 -2.5 3p.m. 29.936 29.950 -.014 78 -1.5 76.5 No obs. - 63.75 No obs. -

May 3. 9a.m. 29.961 29.952 +.009 71.5 -1.5 70.0 No obs. - 58.5 No obs. - 12.30p.m. 29.880 29.900 -.020 83 -2.5 80.5 81.0 -0.5 63.23 62.0 +1.25 3p.m. 29.820 29.850 -.030 83 -1.1 81.9 82.5 -0.6 62.0 62.5 -0.5

May 4. 9a.m. 29.716 29.750 -.024 71.5 -1.25 70.25 71.0 -0.75 63.25 63.0 +0.25 12.30p.m. 29.679 29.700 -.021 89.5 -1.25 87.75 88.0 -0.25 70.25 69.5 +0.75 3.30p.m. 29.617 29.650 -.033 89.5 -1.0 88.5 89.0 -0.5 70.0 69.0 +1.0

May 5. 9.30a.m. 29.586 29.600 -.014 76.5 -1.5 75.0 No obs. - No obs.No obs. - 12.30p.m. No obs. No obs. - 83 -2.0 81.0 82.0 -1.0 69.75 68.5 +1.25 3p.m. 29.603 29.602 -.001 82 -1.5 80.5 81.0 -0.5 69.0 67.0 +2.0

May 6. 9a.m. 29.780 29.800 -.020 70 -1.75 68.25 69.0 -0.75 63.0 63.0 0.0 12.30p.m. 29.785 29.800 -.015 77 -2.0 75.0 76.0 -1.0 65.25 65.0 +0.25 3p.m. 29.778 29.800 -.022 79 -2.0 77.0 77.5 -0.5 67.5 66.0 +1.5

May 7. 9a.m. 29.854 29.850 +.004 67 -2.0 65.0 66.0 -1.0 60.75 61.0 -0.25 12.30p.m. 29.822 29.802 -.020 80.5 -1.5 79.0 79.0 0.0 66.0 65.0 +1.0

Endnotes:

[EN#1] The word is explained in my ”Itineraries,” part ii. sect.

3.

[EN#2] See Appendix IV. ”Botanical Notes.”

[EN#3] ”Opens,” i.e. the door for a higher price: it is the usual formula of refusing to sell.