172 C. I. Burton. —Physical Observations of 7 Mars. 
By the kind permission of Dr. Schiaparelli, I am able to give this Map, andI venture to think that 
no better commentary on it can be found than Dr. Schiaparelli’s own words, a literal translation of which 
is here given. Vide also his memoir ‘On Observations of Mars,’ published in the Atti della Reale Accademia 
dei Lincet, 1877-8. 
“ All the details contained in that chart (/oc. vit.) have been fully confirmed by my observations of 
1879, which (year) has been much more favourable here than that of 1877. There is no exception, save 
for the surroundings of the region named Aurea Cherso [Browning and Copernicus Land (Green) |, which 
IT have not been able to study as conveniently in 1879, and in which, perhaps, some change has taken 
place. Other more or less considerable changes have been detected in other regions of the planet, 
probably in consequence of altered meteorological conditions. ‘Thus the Nile beneath Chryses [a part of 
Midler Continent (Green) | was in 1879 interrupted by a large ‘lake,’ which is, probably, the southern 
part of Tycho Sea [nobel Sew (Green)]. From that lake issue eight branches or ‘canals,’ as shown in 
the annexed sketch (vide Map). Not having as yet computed the positions, the lower portion of the 
sketch shows the objects violently foreshortened, nearly as I have seen them. The lines (canals) aa, 66, 
ce, are much stronger than the others. aa is the Indus [? Dawes Strait of Proctor, Terby], 6b the Ganges, 
cc the Chrysorrhoas of my chart. Atm is the forked bay of Dawes. A part of all that is recognisable 
in your drawing No. 3. The ‘canal’ dd (Hydaspes, Dawes Strait, according to Schiaparelli) was very 
conspicuous in 1864, and I find it in all Dawes’ drawings. In 1877 I could only see its mouth. Lastly, 
the ‘canal’ kk is probably the same which occurs in your sketch of October 24th (No. 6), no trace of 
which was visible in 1877.* In November and December it was broad and very distinct, almost as 
much so as the Ganges. The luminous band which you have marked in the same drawing as traversing 
the Sinus Aurore (Delarue Ocean) is indeed the same transitory phenomenon which I saw on September 
26th, 1877.” The letter above quoted bears date Jan. 17, 1880. 
On March 22, 1880, Dr. Schiaparelli writes as follows :—‘“<If you desire to introduce my sketch of 
the regions below, 7.e., north of the Erythraan Sea (Strat of Herschel II.), into your memoir, I shall be 
honoured, only I beg you to give notice that the respective positions are laid down from eye estimations, 
and they will undergo corrections when I shall have finished the computation of micrometric measure- 
ments for the purpose of compiling a regular chart.” 
There will, however, be no difficulty in comparing this map with that forming Fig. 1, Plate VIII., by 
making the required alterations mentally. 
« It appears in Dawes’ drawings of 1864. 
Tasie of Lonerrupes of Canrran Merrtpian of Mars’ Disk corresponding to each 
of the Drawings. 
(Plates VI. and VII.) 
No. of drawing. Longitude of centre. No.of drawing. Longitude of centre. No. of drawing. Longitude of centre 
1 16°°7 (at end.) 9 6 o MIB! 17 . o Alil© 
9 26 10 . 1i4 18 ! . 212 
3 28 11 : o dl? 19 : o Pils 
4 36 12 . . 142 20 : . 216 
5 47 13 : . 144 21 : 22.0) 
6 48 14 . los 22 6 . 233 
7 93 15 : o GIL 3 0 - 250 
8 103 16 0 LOO 24 . . 3809 
