Cika wannan jumla: Ƙungiyar Kasuwancin Kasuwancin San Francisco (est. 1852) ƙungiya ce ta jama'a da aka shirya a San Francisco, California, don "ƙaddamar da gasa mai karimci a cikin al'adun tunani, ta hanyar sanya shi salon karatu da tattaunawa kan batutuwan adabi". Waɗanda suka kafa ta, J. B. Crockett, F. A. Woodworth, da F. C. Ewer sun yi burin "su sa wannan birni da aka kafa ba da daɗewa ba ya zama sananne ga littattafai da kimiyya kamar yadda ya riga ya zama sananne ga kasuwanci da wadata". A shekara ta 1854 rukunin ya tara littattafai 3,000 don laburarensa. Laburaren ya karu zuwa kundin 14,000 ta 1861, kuma zuwa 36,000 ta 1874. Abubuwan da aka mallaka sun haɗa da rubuce-rubucen tafiye-tafiye, rubuce-rubuce, wasan kwaikwayo, tarihin California, tarihin Amurka, da adabin Chaucer, Shakespeare, da Sainte-Beuve. A cikin 1906 ƙungiyar ta haɗu cikin Cibiyar Injiniya ta San Francisco. Daga baya a wannan shekarar an
bala'in girgizar kasa ta lalata tarin abubuwan da aka hade. Cibiyar gina wani sabon Mechanics'-Mercantile Library gini a 1910.