from lxml import html
import requests

page = requests.get('http://s...content-available-to-author-only...g.net/key/L7815')
tree = html.fromstring(page.content)

table = tree.xpath('/html/body/center/div[1]/center/table[3]/tbody')[0].findall('tr')
data = list()


for row in table:
    data.append([c.text for c in row.getchildren()])

print(data)