 yea peraalo paerkonna anni tedeelanu sangrahinchi , {Date} - {Description}  akrutilo bullett ‌ lanu upayoginchi vatini jaabithaa chaeyamdi 
 karolina biological supply companieni  1927 loo dr thomas i .  powell juunior ,  elon collegeelo  ( prasthutham elon universiti )  jialogy mariyu biologi professor ‌ gaaa stapincharu . 1920 va dasakamlo ,  science upaadhyaayulu vaari tharagathulu mariyu prayogasaalalalo varu upayoginchina chaaala padhaarthaalanu sekarinchavalasi vacchindi ,  idi vaari praadhimika badhyathala nundi gananiyamaina samayanni teesukundi .  itara upaadhyaayula maadirigaane ,  daa .  powell tana taragatulaku namunalanu saekarinchaemduku fiield ‌ loo ekuva samayam gadipaadu .  athanu saadharanamga avasaramaina danikante ekuva sampaadinchinanduna ,  athanu tana sahodyogulaku migulunu vikrayinchaadu .  raboye samvatsaaraallo powell tana sekarana saamardhyaala avasaraanni mundhey oohinchinanduna atani prayatnalu karolina biological supply companyni edigaayi .
• 1927 -  idi karolina biological supply kompany sthaapinchabadinappudu .
• 1920 lu  -  yea kaalamlo science upaadhyaayulu thama tharagathulu mariyu prayogasaalalalo upayoginchina chaaala padhaarthaalanu sekarinchavalasi vacchindi ,  idi vaari praadhimika badhyathala nundi chaaala samayam pattindhi .