Question

Which phrases in this excerpt from Robert Stawell Ball's Great Astronomers convey a commendable tone toward Ptolemy’s work?

The name, Ptolemy, appears to have been a common one in Egypt in those days. The time at which he lived is fixed by the fact that his first recorded observation was made in 127 AD, and his last in 151 AD. When we add that he seems to have lived in or near Alexandria, or to use his own words, "on the parallel of Alexandria," we have said everything that can be said so far as his individuality is concerned.
Ptolemy is, without doubt, the greatest figure in ancient astro

Answer 1

It seems that you didn't include the whole excerpt, given that the last sentence abruptly stops in the middle. However, the phrases in this excerpt from Robert Stawell Ball's Great Astronomers that convey a commendable tone toward Ptolemy’s work are found in the last (incomplete) sentence: Ptolemy is, without doubt, the greatest figure in ancient astronomy. 
Commendable means praise-worthy. 

Answer 2

Answer:

Ptolemy is, without doubt, the greatest figure in ancient astronomy.

Explanation:

just look for evidence in the tutorial .... hope this helps.