Rubuta ci gaba don wannan sakin layi - Misalai na farko na misalai guda biyu sun haɗa da taswirar tafiyar Napoleon a kan Moscow wanda Charles Joseph Minard ya samar a 1869; "coxcombs" da Florence Nightingale ta yi amfani da shi a 1857 a matsayin wani ɓangare na yaƙin neman inganta yanayin tsabta a cikin sojojin Burtaniya; da kuma taswirar da John Snow ya yi amfani da shi a 1855 don ganin cutar kwalara ta Broad Street
Ka yi haƙuri.