Professional uses allowed are: accountants, advertisers, appraisers, architects, assayers, attorneys, beauty shops, building designers, chiropractors, chiropodists, clinical laboratories, collection agencies, contractors (no warehousing of material), dental laboratories, detective agencies, dentists, geologists, insurance adjusters, interior decorator services (no display rooms, retail sales, and no warehousing of materials), insurance offices, land surveyors, medical doctors, medical laboratories, oculists, opticians, optometrists, osteopaths, physical therapists, podiatrists, private detectives, professional engineers, psychologists, real estate offices, secretary services and telephone answering services, subject to first securing a use permit;