08. p. 85.↑ University of Chicago Press 2010. p. 83; The 16th edition of the Chicago Manual of Style instructs editors to remove extra spaces between sentences when preparing a manuscript for publication; also Weiderkehr 2009.↑ Williams 2003. 13; Smith 2009.↑ Jury 2004. 92; Williams 1995.↑ Wheildon 1995. p. 13.↑ Tinker 1963. p. 50.↑ Tinker 1963. pp. 88, 108, 127, 128, 153; Wheildon 1995. pp. 8, 35.↑ Tinker 1963. pp. 50, 108, 128. A useful example is the Helvetica font, an ubiquitous font that is considered to be visually pleasing in the construction and viewing of its characters, but has been found to impair reading effectiveness (readability). See Squire 2006. p. 36.↑ Leonard, et al. 2009.↑ Loh et al., 2002. p. 4.↑ Clinton 2003. The study did not find "statistically significant differences, between reading time of single and double spaces passages".↑ Ni et al. 2009. pp. 383, 387, 390. This study "explored the effects of spacing after the period on on-screen readi