Rh, thanks for the time and corrections kind teacher.
What led me to ask the question was that I've commonly seen for example merck entries that might say a substance is soluble in maybee 3 named solvents. So it makes me think that the author is giving me enough solubility information that I should bee able to extrapolate solubility in other solvents. (He is but for the reason you said lastly)
From what you've said, Ill take it as the author giving me the probable solubilities of a substance in a small band of the spectrum of solvent polarities.
Actually, giving 3 solubilities is nice, it probably vaguely describes the centre and upper and lower limits of the band!
And this also probably extends to giving the polarity of the actual substance, unless it's a substance that doesn't follow the "like dissolves like" rule.
sorry for talking so much
bye for now